diff --git a/packages/altertable-js/README.md b/packages/altertable-js/README.md
index e8eb67a..ee6f172 100644
--- a/packages/altertable-js/README.md
+++ b/packages/altertable-js/README.md
@@ -47,7 +47,7 @@ altertable.alias('new_user_id-019aca6a-1e42-71af-81a0-1e14bbe2ccbd');
 ## Features
 
 - **Automatic page view tracking** – Captures page views automatically
-- **Session management** – Handles visitor and session IDs automatically
+- **Session management** – Handles anonymous and session IDs automatically
 - **Event queuing** – Queues events when offline or consent is pending
 - **Privacy compliance** – Built-in tracking consent management
 - **Multiple storage options** – localStorage, cookies, or both
diff --git a/packages/altertable-js/src/constants.ts b/packages/altertable-js/src/constants.ts
index 94a582b..b96657a 100644
--- a/packages/altertable-js/src/constants.ts
+++ b/packages/altertable-js/src/constants.ts
@@ -5,7 +5,7 @@ export const keyBuilder = createKeyBuilder(STORAGE_KEY_PREFIX, '.');
 export const STORAGE_KEY_TEST = keyBuilder('check');
 
 export const PREFIX_SESSION_ID = 'session';
-export const PREFIX_VISITOR_ID = 'visitor';
+export const PREFIX_ANONYMOUS_ID = 'anonymous';
 export const PREFIX_DEVICE_ID = 'device';
 
 const MINUTE_IN_MS = 1_000 * 60;
diff --git a/packages/altertable-js/src/lib/logger.ts b/packages/altertable-js/src/lib/logger.ts
index 2c66905..c2fd711 100644
--- a/packages/altertable-js/src/lib/logger.ts
+++ b/packages/altertable-js/src/lib/logger.ts
@@ -56,9 +56,9 @@ export function createLogger(prefix: string) {
       const [userValueLabel, userValueStyle] = createValueElement(
         payload.distinct_id ?? 'Not set'
       );
-      const [visitorLabel, visitorLabelStyle] =
-        createEventLabelElement('Visitor ID');
-      const [visitorValueLabel, visitorValueStyle] = createValueElement(
+      const [anonymousLabel, anonymousLabelStyle] =
+        createEventLabelElement('Anonymous ID');
+      const [anonymousValueLabel, anonymousValueStyle] = createValueElement(
         payload.anonymous_id ?? 'Not set'
       );
       const [sessionLabel, sessionLabelStyle] =
@@ -73,9 +73,9 @@ export function createLogger(prefix: string) {
         userValueStyle
       );
       console.log(
-        `%c${visitorLabel} %c${visitorValueLabel}`,
-        visitorLabelStyle,
-        visitorValueStyle
+        `%c${anonymousLabel} %c${anonymousValueLabel}`,
+        anonymousLabelStyle,
+        anonymousValueStyle
       );
       console.log(
         `%c${sessionLabel} %c${sessionValueLabel}`,
diff --git a/packages/altertable-js/src/lib/sessionManager.ts b/packages/altertable-js/src/lib/sessionManager.ts
index 994ca17..0c02ce4 100644
--- a/packages/altertable-js/src/lib/sessionManager.ts
+++ b/packages/altertable-js/src/lib/sessionManager.ts
@@ -1,17 +1,17 @@
 import {
+  PREFIX_ANONYMOUS_ID,
   PREFIX_DEVICE_ID,
   PREFIX_SESSION_ID,
-  PREFIX_VISITOR_ID,
   SESSION_EXPIRATION_TIME_MS,
   TrackingConsent,
   TrackingConsentType,
 } from '../constants';
 import type {
+  AnonymousId,
   DeviceId,
   DistinctId,
   SessionId,
   UserId,
-  VisitorId,
 } from '../types';
 import { generateId } from './generateId';
 import { Logger } from './logger';
@@ -20,7 +20,7 @@ import { type StorageApi } from './storage';
 type SessionData = {
   deviceId: DeviceId;
   distinctId: DistinctId;
-  anonymousId: VisitorId | null;
+  anonymousId: AnonymousId | null;
   sessionId: SessionId;
   lastEventAt: string | null;
   trackingConsent: TrackingConsentType;
@@ -61,7 +61,7 @@ export class SessionManager {
 
       this._sessionData = {
         deviceId: parsedData.deviceId || this._generateDeviceId(),
-        distinctId: parsedData.distinctId || this._generateVisitorId(),
+        distinctId: parsedData.distinctId || this._generateAnonymousId(),
         sessionId: parsedData.sessionId || this._generateSessionId(),
         anonymousId: parsedData.anonymousId || null,
         lastEventAt: parsedData.lastEventAt || null,
@@ -91,7 +91,7 @@ export class SessionManager {
     return this._sessionData.distinctId;
   }
 
-  getAnonymousId(): VisitorId | null {
+  getAnonymousId(): AnonymousId | null {
     return this._sessionData.anonymousId;
   }
 
@@ -103,13 +103,13 @@ export class SessionManager {
    *
    * When transitioning from anonymous to identified, we preserve the anonymous ID
    * to enable identity merging on the backend. This allows:
-   * - Linking pre-identification events (anonymous visitor ID) to post-identification events (user ID)
+   * - Linking pre-identification events (anonymous ID) to post-identification events (user ID)
    * - Merging user profiles so anonymous browsing behavior is associated with the identified user
    * - Maintaining a complete user journey from first visit through identification
    *
    * **State Transitions:**
-   * - **Anonymous:** `anonymousId = null`, `distinctId = visitorId`, `isIdentified() = false`
-   * - **Identified:** `anonymousId = previous visitorId`, `distinctId = userId`, `isIdentified() = true`
+   * - **Anonymous:** `anonymousId = null`, `distinctId = anonymousId`, `isIdentified() = false`
+   * - **Identified:** `anonymousId = previous distinctId`, `distinctId = userId`, `isIdentified() = true`
    */
   isIdentified(): boolean {
     return Boolean(this._sessionData.anonymousId);
@@ -124,7 +124,7 @@ export class SessionManager {
   }
 
   identify(userId: UserId): void {
-    this._sessionData.anonymousId = this._sessionData.distinctId as VisitorId;
+    this._sessionData.anonymousId = this._sessionData.distinctId as AnonymousId;
     this._sessionData.distinctId = userId;
     this._persistToStorage();
   }
@@ -168,7 +168,7 @@ export class SessionManager {
 
     this._sessionData.sessionId = this._generateSessionId();
     this._sessionData.anonymousId = null;
-    this._sessionData.distinctId = this._generateVisitorId();
+    this._sessionData.distinctId = this._generateAnonymousId();
     this._sessionData.lastEventAt = null;
     this._persistToStorage();
   }
@@ -177,7 +177,7 @@ export class SessionManager {
     return {
       anonymousId: null,
       deviceId: this._generateDeviceId(),
-      distinctId: this._generateVisitorId(),
+      distinctId: this._generateAnonymousId(),
       lastEventAt: null,
       sessionId: this._generateSessionId(),
       trackingConsent: this._defaultTrackingConsent,
@@ -192,8 +192,8 @@ export class SessionManager {
     return generateId(PREFIX_DEVICE_ID);
   }
 
-  private _generateVisitorId(): VisitorId {
-    return generateId(PREFIX_VISITOR_ID);
+  private _generateAnonymousId(): AnonymousId {
+    return generateId(PREFIX_ANONYMOUS_ID);
   }
 
   private _shouldRenewSession(): boolean {
diff --git a/packages/altertable-js/src/types.ts b/packages/altertable-js/src/types.ts
index 6123f5b..ad90c2a 100644
--- a/packages/altertable-js/src/types.ts
+++ b/packages/altertable-js/src/types.ts
@@ -5,9 +5,9 @@ export type EventType = 'track' | 'identify' | 'alias';
 export type EventProperties = Record<string, unknown>;
 
 export type UserId = string;
-export type DistinctId = StringWithAutocomplete<UserId | VisitorId>;
+export type DistinctId = StringWithAutocomplete<UserId | AnonymousId>;
 export type DeviceId = `device-${string}`;
-export type VisitorId = `visitor-${string}`;
+export type AnonymousId = `anonymous-${string}`;
 export type SessionId = `session-${string}`;
 export type Environment = StringWithAutocomplete<
   'production' | 'development' | 'staging'
@@ -21,7 +21,7 @@ export type AltertableContext = {
   environment: Environment;
   device_id: DeviceId;
   distinct_id: DistinctId;
-  anonymous_id: VisitorId | null;
+  anonymous_id: AnonymousId | null;
   session_id: SessionId;
 };
 
diff --git a/packages/altertable-js/test/core.test.ts b/packages/altertable-js/test/core.test.ts
index 5e21c7a..d3712ec 100644
--- a/packages/altertable-js/test/core.test.ts
+++ b/packages/altertable-js/test/core.test.ts
@@ -9,9 +9,9 @@ import {
 } from '../../../test-utils/networkMode';
 import {
   EVENT_PAGEVIEW,
+  PREFIX_ANONYMOUS_ID,
   PREFIX_DEVICE_ID,
   PREFIX_SESSION_ID,
-  PREFIX_VISITOR_ID,
   PROPERTY_LIB,
   PROPERTY_LIB_VERSION,
   PROPERTY_REFERER,
@@ -28,11 +28,11 @@ import { UserId, UserTraits } from '../src/types';
 const REGEXP_DATE_ISO = /^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}\.\d{3}Z$/;
 const REGEXP_SESSION_ID = new RegExp(`^${PREFIX_SESSION_ID}-`);
 const REGEXP_DEVICE_ID = new RegExp(`^${PREFIX_DEVICE_ID}-`);
-const REGEXP_VISITOR_ID = new RegExp(`^${PREFIX_VISITOR_ID}-`);
+const REGEXP_ANONYMOUS_ID = new RegExp(`^${PREFIX_ANONYMOUS_ID}-`);
 
 function createSessionData(overrides: Record<string, any> = {}) {
   return JSON.stringify({
-    distinctId: 'visitor-test-uuid-1-1234567890',
+    distinctId: 'anonymous-test-uuid-1-1234567890',
     anonymousId: null,
     sessionId: 'session-test-uuid-2-1234567890',
     deviceId: 'device-test-uuid-3-1234567890',
@@ -134,7 +134,7 @@ describe('Altertable', () => {
             event: EVENT_PAGEVIEW,
             timestamp: expect.stringMatching(REGEXP_DATE_ISO),
             device_id: expect.stringMatching(REGEXP_DEVICE_ID),
-            distinct_id: expect.stringMatching(REGEXP_VISITOR_ID),
+            distinct_id: expect.stringMatching(REGEXP_ANONYMOUS_ID),
             anonymous_id: null,
             session_id: expect.stringMatching(REGEXP_SESSION_ID),
             environment: 'production',
@@ -165,7 +165,7 @@ describe('Altertable', () => {
           payload: {
             event: 'eventName',
             device_id: expect.stringMatching(REGEXP_DEVICE_ID),
-            distinct_id: expect.stringMatching(REGEXP_VISITOR_ID),
+            distinct_id: expect.stringMatching(REGEXP_ANONYMOUS_ID),
             timestamp: expect.stringMatching(REGEXP_DATE_ISO),
             anonymous_id: null,
             session_id: expect.stringMatching(REGEXP_SESSION_ID),
@@ -611,7 +611,7 @@ describe('Altertable', () => {
             device_id: expect.stringMatching(REGEXP_DEVICE_ID),
             traits: {},
             distinct_id: userId,
-            anonymous_id: expect.stringMatching(REGEXP_VISITOR_ID),
+            anonymous_id: expect.stringMatching(REGEXP_ANONYMOUS_ID),
           },
         });
       });
@@ -629,7 +629,7 @@ describe('Altertable', () => {
             device_id: expect.stringMatching(REGEXP_DEVICE_ID),
             traits,
             distinct_id: userId,
-            anonymous_id: expect.stringMatching(REGEXP_VISITOR_ID),
+            anonymous_id: expect.stringMatching(REGEXP_ANONYMOUS_ID),
           },
         });
       });
@@ -747,7 +747,7 @@ describe('Altertable', () => {
             device_id: expect.stringMatching(REGEXP_DEVICE_ID),
             traits: { email: 'user@example.com' },
             distinct_id: userId,
-            anonymous_id: expect.stringMatching(REGEXP_VISITOR_ID),
+            anonymous_id: expect.stringMatching(REGEXP_ANONYMOUS_ID),
           },
         });
 
@@ -759,7 +759,7 @@ describe('Altertable', () => {
             device_id: expect.stringMatching(REGEXP_DEVICE_ID),
             traits: { email: 'user@example.com' },
             distinct_id: userId,
-            anonymous_id: expect.stringMatching(REGEXP_VISITOR_ID),
+            anonymous_id: expect.stringMatching(REGEXP_ANONYMOUS_ID),
           },
         });
       });
@@ -799,7 +799,7 @@ describe('Altertable', () => {
             device_id: expect.stringMatching(REGEXP_DEVICE_ID),
             traits: newTraits,
             distinct_id: 'user123',
-            anonymous_id: expect.stringMatching(REGEXP_VISITOR_ID),
+            anonymous_id: expect.stringMatching(REGEXP_ANONYMOUS_ID),
             session_id: expect.stringMatching(REGEXP_SESSION_ID),
           },
         });
@@ -881,7 +881,7 @@ describe('Altertable', () => {
           environment: expect.any(String),
           device_id: expect.stringMatching(REGEXP_DEVICE_ID),
           new_user_id: 'user456',
-          distinct_id: expect.stringMatching(REGEXP_VISITOR_ID),
+          distinct_id: expect.stringMatching(REGEXP_ANONYMOUS_ID),
           anonymous_id: null,
         })
       );
@@ -933,7 +933,7 @@ describe('Altertable', () => {
       }).toRequestApi('/alias', {
         payload: expect.objectContaining({
           new_user_id: 'user456',
-          distinct_id: expect.stringMatching(REGEXP_VISITOR_ID),
+          distinct_id: expect.stringMatching(REGEXP_ANONYMOUS_ID),
           anonymous_id: null,
         }),
       });
@@ -954,7 +954,7 @@ describe('Altertable', () => {
         payload: expect.objectContaining({
           new_user_id: 'user456',
           distinct_id: 'user123',
-          anonymous_id: expect.stringMatching(REGEXP_VISITOR_ID),
+          anonymous_id: expect.stringMatching(REGEXP_ANONYMOUS_ID),
         }),
       });
     });
@@ -973,10 +973,10 @@ describe('Altertable', () => {
       });
 
       it('persists session ID across page reloads', () => {
-        const testVisitorId = 'visitor-test-uuid-1-1234567890';
+        const testAnonymousId = 'anonymous-test-uuid-1-1234567890';
         const testSessionId = 'session-test-uuid-2-1234567890';
         const existingSessionData = createSessionData({
-          visitorId: testVisitorId,
+          anonymousId: testAnonymousId,
           sessionId: testSessionId,
         });
 
@@ -999,13 +999,13 @@ describe('Altertable', () => {
     describe('session renewal', () => {
       it('regenerates session ID when event sent after 30 minutes', () => {
         vi.useFakeTimers();
-        const testVisitorId = 'visitor-test-uuid-3-1234567890';
+        const testAnonymousId = 'anonymous-test-uuid-3-1234567890';
         const testSessionId = 'session-test-uuid-4-1234567890';
         const thirtyMinutesAgo = new Date(
           Date.now() - 30 * 60 * 1000 - 1000
         ).toISOString();
         const existingSessionData = createSessionData({
-          visitorId: testVisitorId,
+          anonymousId: testAnonymousId,
           sessionId: testSessionId,
           lastEventAt: thirtyMinutesAgo,
         });
@@ -1045,13 +1045,13 @@ describe('Altertable', () => {
 
       it('does not regenerate session ID when event sent within 30 minutes', () => {
         vi.useFakeTimers();
-        const testVisitorId = 'visitor-test-uuid-5-1234567890';
+        const testAnonymousId = 'anonymous-test-uuid-5-1234567890';
         const testSessionId = 'session-test-uuid-6-1234567890';
         const twentyNineMinutesAgo = new Date(
           Date.now() - 29 * 60 * 1000
         ).toISOString();
         const existingSessionData = createSessionData({
-          visitorId: testVisitorId,
+          anonymousId: testAnonymousId,
           sessionId: testSessionId,
           lastEventAt: twentyNineMinutesAgo,
         });
@@ -1099,7 +1099,7 @@ describe('Altertable', () => {
 
         altertable.reset();
         const distinctId = altertable['_sessionManager'].getDistinctId();
-        expect(distinctId).toMatch(REGEXP_VISITOR_ID);
+        expect(distinctId).toMatch(REGEXP_ANONYMOUS_ID);
         const anonymousId = altertable['_sessionManager'].getAnonymousId();
         expect(anonymousId).toBeNull();
       });
@@ -1120,7 +1120,7 @@ describe('Altertable', () => {
         expect(newSessionId).toMatch(REGEXP_SESSION_ID);
 
         const newDistinctId = altertable['_sessionManager'].getDistinctId();
-        expect(newDistinctId).toMatch(REGEXP_VISITOR_ID);
+        expect(newDistinctId).toMatch(REGEXP_ANONYMOUS_ID);
         const newAnonymousId = altertable['_sessionManager'].getAnonymousId();
         expect(newAnonymousId).toBeNull();
       });
@@ -1174,7 +1174,7 @@ describe('Altertable', () => {
           ];
         const storedData = JSON.parse(lastCall[1]);
         expect(storedData).toMatchObject({
-          anonymousId: expect.stringMatching(REGEXP_VISITOR_ID),
+          anonymousId: expect.stringMatching(REGEXP_ANONYMOUS_ID),
           sessionId: expect.stringMatching(REGEXP_SESSION_ID),
           distinctId: 'user123',
           lastEventAt: null,
@@ -1182,7 +1182,7 @@ describe('Altertable', () => {
       });
 
       it('recovers storage data on initialization', () => {
-        const testAnonymousId = 'visitor-test-uuid-3-1234567890';
+        const testAnonymousId = 'anonymous-test-uuid-3-1234567890';
         const testSessionId = 'session-test-uuid-4-1234567890';
         const existingData = createSessionData({
           anonymousId: testAnonymousId,
@@ -1233,7 +1233,7 @@ describe('Altertable', () => {
         const distinctId = altertable['_sessionManager'].getDistinctId();
         const sessionId = altertable['_sessionManager'].getSessionId();
         const anonymousId = altertable['_sessionManager'].getAnonymousId();
-        expect(distinctId).toMatch(REGEXP_VISITOR_ID);
+        expect(distinctId).toMatch(REGEXP_ANONYMOUS_ID);
         expect(sessionId).toMatch(REGEXP_SESSION_ID);
         expect(anonymousId).toBeNull();
       });
@@ -1635,7 +1635,7 @@ describe('Altertable', () => {
       // 6. Reset (should clear state)
       altertable.reset();
       expect(altertable['_sessionManager'].getDistinctId()).toMatch(
-        REGEXP_VISITOR_ID
+        REGEXP_ANONYMOUS_ID
       );
       expect(altertable['_sessionManager'].getAnonymousId()).toBeNull();
       expect(altertable['_sessionManager'].getSessionId()).toMatch(
diff --git a/packages/altertable-js/test/logger.test.ts b/packages/altertable-js/test/logger.test.ts
index aa42cc0..98aa38c 100644
--- a/packages/altertable-js/test/logger.test.ts
+++ b/packages/altertable-js/test/logger.test.ts
@@ -96,7 +96,7 @@ describe('Logger', () => {
       device_id: 'device-123',
       distinct_id: 'user123',
       session_id: 'session-123',
-      anonymous_id: 'visitor-123',
+      anonymous_id: 'anonymous-123',
       environment: 'development',
       properties: {
         key1: 'value1',
@@ -134,7 +134,7 @@ describe('Logger', () => {
       );
     });
 
-    it('handles undefined user_id', () => {
+    it('handles undefined distinct_id', () => {
       const logger = createLogger('TestLogger');
       const payloadWithoutUser: TrackPayload = {
         ...mockEventPayload,
@@ -150,29 +150,31 @@ describe('Logger', () => {
       );
     });
 
-    it('logs visitor information', () => {
+    it('logs anonymous information', () => {
       const logger = createLogger('TestLogger');
 
       logger.logEvent(mockEventPayload, { trackingConsent: 'granted' });
 
       expect(console.log).toHaveBeenCalledWith(
-        '%cVisitor ID %cvisitor-123',
+        '%cAnonymous ID %canonymous-123',
         expect.any(String),
         expect.any(String)
       );
     });
 
-    it('handles undefined visitor_id', () => {
+    it('handles undefined anonymous_id', () => {
       const logger = createLogger('TestLogger');
-      const payloadWithoutVisitor: TrackPayload = {
+      const payloadWithoutAnonymousId: TrackPayload = {
         ...mockEventPayload,
         anonymous_id: undefined,
       };
 
-      logger.logEvent(payloadWithoutVisitor, { trackingConsent: 'granted' });
+      logger.logEvent(payloadWithoutAnonymousId, {
+        trackingConsent: 'granted',
+      });
 
       expect(console.log).toHaveBeenCalledWith(
-        '%cVisitor ID %cNot set',
+        '%cAnonymous ID %cNot set',
         expect.any(String),
         expect.any(String)
       );
@@ -327,7 +329,7 @@ describe('Logger', () => {
       },
       device_id: 'device-123',
       distinct_id: 'user123',
-      anonymous_id: 'visitor-123' as const,
+      anonymous_id: 'anonymous-123' as const,
     };
 
     it('logs identify event with all components', () => {
@@ -376,13 +378,13 @@ describe('Logger', () => {
       );
     });
 
-    it('logs visitor information', () => {
+    it('logs anonymous information', () => {
       const logger = createLogger('TestLogger');
 
       logger.logIdentify(mockIdentifyPayload, { trackingConsent: 'granted' });
 
       expect(console.log).toHaveBeenCalledWith(
-        '%cAnonymous ID %cvisitor-123',
+        '%cAnonymous ID %canonymous-123',
         expect.any(String),
         expect.any(String)
       );
@@ -469,7 +471,7 @@ describe('Logger', () => {
       new_user_id: 'user--456',
       device_id: 'device-123',
       distinct_id: 'user123',
-      anonymous_id: 'visitor-123' as const,
+      anonymous_id: 'anonymous-123' as const,
     };
 
     it('logs alias event with all components', () => {
diff --git a/packages/altertable-js/test/requester.test.ts b/packages/altertable-js/test/requester.test.ts
index 41ab94e..02be4c9 100644
--- a/packages/altertable-js/test/requester.test.ts
+++ b/packages/altertable-js/test/requester.test.ts
@@ -21,7 +21,7 @@ function createTrackEventPayload(
     environment: 'test',
     device_id: 'device-0197d9df-3c3b-734e-96dd-dfda52b0167c',
     distinct_id: 'u_01jzcxxwcgfzztabq1e3dk1y8q',
-    anonymous_id: 'visitor-0197d9df-3c3b-734e-96dd-dfda52b0167c',
+    anonymous_id: 'anonymous-0197d9df-3c3b-734e-96dd-dfda52b0167c',
     session_id: 'session-0197d9df-4e77-72cb-bf0a-e35b3f1f5425',
     ...overrides,
   };
@@ -35,7 +35,7 @@ function createIdentifyEventPayload(
     environment: 'test',
     device_id: 'device-0197d9df-3c3b-734e-96dd-dfda52b0167c',
     distinct_id: 'u_01jzcxxwcgfzztabq1e3dk1y8q',
-    anonymous_id: 'visitor-0197d9df-3c3b-734e-96dd-dfda52b0167c',
+    anonymous_id: 'anonymous-0197d9df-3c3b-734e-96dd-dfda52b0167c',
     ...overrides,
   };
 }
diff --git a/packages/altertable-js/test/sessionManager.test.ts b/packages/altertable-js/test/sessionManager.test.ts
index 53ce58c..b494614 100644
--- a/packages/altertable-js/test/sessionManager.test.ts
+++ b/packages/altertable-js/test/sessionManager.test.ts
@@ -5,9 +5,9 @@ import {
   StorageMock,
 } from '../../../test-utils/mocks/storageMock';
 import {
+  PREFIX_ANONYMOUS_ID,
   PREFIX_DEVICE_ID,
   PREFIX_SESSION_ID,
-  PREFIX_VISITOR_ID,
   SESSION_EXPIRATION_TIME_MS,
   TrackingConsent,
 } from '../src/constants';
@@ -54,7 +54,7 @@ describe('SessionManager with tracking consent', () => {
       mockStorage.getItem.mockReturnValue(
         JSON.stringify({
           deviceId: 'device-test-1',
-          distinctId: 'visitor-test-1',
+          distinctId: 'anonymous-test-1',
           anonymousId: null,
           sessionId: 'session-test-1',
           lastEventAt: null,
@@ -77,7 +77,7 @@ describe('SessionManager with tracking consent', () => {
       mockStorage.getItem.mockReturnValue(
         JSON.stringify({
           deviceId: 'device-test-1',
-          distinctId: 'visitor-test-1',
+          distinctId: 'anonymous-test-1',
           anonymousId: null,
           sessionId: 'session-test-1',
           lastEventAt: null,
@@ -153,7 +153,7 @@ describe('SessionManager with tracking consent', () => {
     it('should handle tracking consent in session data recovery', () => {
       const storedData = JSON.stringify({
         deviceId: 'device-test-1',
-        anonymousId: 'visitor-test-1',
+        anonymousId: 'anonymous-test-1',
         sessionId: 'session-test-1',
         distinctId: 'user123',
         lastEventAt: '2023-01-01T00:00:00.000Z',
@@ -179,7 +179,7 @@ describe('SessionManager with tracking consent', () => {
     it('should handle missing tracking consent in stored data', () => {
       const storedData = JSON.stringify({
         deviceId: 'device-test-1',
-        distinctId: 'visitor-test-1',
+        distinctId: 'anonymous-test-1',
         anonymousId: null,
         sessionId: 'session-test-1',
         lastEventAt: null,
@@ -202,7 +202,7 @@ describe('SessionManager with tracking consent', () => {
     it('should handle null tracking consent in stored data', () => {
       const storedData = JSON.stringify({
         deviceId: 'device-test-1',
-        distinctId: 'visitor-test-1',
+        distinctId: 'anonymous-test-1',
         anonymousId: null,
         sessionId: 'session-test-1',
         lastEventAt: null,
@@ -225,7 +225,7 @@ describe('SessionManager with tracking consent', () => {
     it('should handle undefined tracking consent in stored data', () => {
       const storedData = JSON.stringify({
         deviceId: 'device-test-1',
-        distinctId: 'visitor-test-1',
+        distinctId: 'anonymous-test-1',
         anonymousId: null,
         sessionId: 'session-test-1',
         lastEventAt: null,
@@ -259,9 +259,9 @@ describe('SessionManager with tracking consent', () => {
 
         expect(sessionManager.isIdentified()).toBe(false);
         expect(sessionManager.getAnonymousId()).toBe(null);
-        // distinctId should be a visitor ID when anonymous
-        const visitorId = sessionManager.getDistinctId();
-        expect(visitorId).toMatch(PREFIX_VISITOR_ID);
+        // distinctId should be a anonymous ID when anonymous
+        const anonymousId = sessionManager.getDistinctId();
+        expect(anonymousId).toMatch(PREFIX_ANONYMOUS_ID);
       });
     });
 
@@ -269,7 +269,7 @@ describe('SessionManager with tracking consent', () => {
       it('should return false when anonymousId is null (anonymous state)', () => {
         const storedData = JSON.stringify({
           deviceId: 'device-test-1',
-          distinctId: 'visitor_test-1', // visitor ID when anonymous
+          distinctId: 'anonymous-test-1', // anonymous ID when anonymous
           anonymousId: null,
           sessionId: 'session-test-1',
           lastEventAt: null,
@@ -288,14 +288,14 @@ describe('SessionManager with tracking consent', () => {
 
         expect(sessionManager.isIdentified()).toBe(false);
         expect(sessionManager.getAnonymousId()).toBe(null);
-        expect(sessionManager.getDistinctId()).toBe('visitor_test-1');
+        expect(sessionManager.getDistinctId()).toBe('anonymous-test-1');
       });
 
       it('should return true when anonymousId is set (identified state)', () => {
         const storedData = JSON.stringify({
           deviceId: 'device-test-1',
           distinctId: 'user123', // user ID after identification
-          anonymousId: 'visitor_test-1', // previous anonymous visitor ID
+          anonymousId: 'anonymous-test-1', // previous anonymous ID
           sessionId: 'session-test-1',
           lastEventAt: null,
           trackingConsent: TrackingConsent.PENDING,
@@ -312,14 +312,14 @@ describe('SessionManager with tracking consent', () => {
         sessionManager.init();
 
         expect(sessionManager.isIdentified()).toBe(true);
-        expect(sessionManager.getAnonymousId()).toBe('visitor_test-1');
+        expect(sessionManager.getAnonymousId()).toBe('anonymous-test-1');
         expect(sessionManager.getDistinctId()).toBe('user123');
       });
 
       it('should return false when anonymousId is missing from stored data', () => {
         const storedData = JSON.stringify({
           deviceId: 'device-test-1',
-          distinctId: 'visitor_test-1',
+          distinctId: 'anonymous-test-1',
           sessionId: 'session-test-1',
           lastEventAt: null,
           trackingConsent: TrackingConsent.PENDING,
@@ -356,12 +356,12 @@ describe('SessionManager with tracking consent', () => {
         expect(sessionManager.isIdentified()).toBe(false);
         expect(sessionManager.getAnonymousId()).toBe(null);
         const initialDistinctId = sessionManager.getDistinctId();
-        expect(initialDistinctId).toMatch(PREFIX_VISITOR_ID);
+        expect(initialDistinctId).toMatch(PREFIX_ANONYMOUS_ID);
 
         // Identify the user
         sessionManager.identify('user123');
 
-        // Now identified: anonymousId stores the previous visitor ID
+        // Now identified: anonymousId stores the previous anonymous ID
         expect(sessionManager.isIdentified()).toBe(true);
         expect(sessionManager.getAnonymousId()).toBe(initialDistinctId);
         expect(sessionManager.getDistinctId()).toBe('user123');
@@ -382,7 +382,7 @@ describe('SessionManager with tracking consent', () => {
 
       expect(sessionManager.getSessionId()).toMatch(PREFIX_SESSION_ID);
       expect(sessionManager.getDeviceId()).toMatch(PREFIX_DEVICE_ID);
-      expect(sessionManager.getDistinctId()).toMatch(PREFIX_VISITOR_ID);
+      expect(sessionManager.getDistinctId()).toMatch(PREFIX_ANONYMOUS_ID);
       expect(sessionManager.getAnonymousId()).toBe(null);
       expect(sessionManager.getLastEventAt()).toBe(null);
       expect(mockStorage.setItem).toHaveBeenCalled();
@@ -391,7 +391,7 @@ describe('SessionManager with tracking consent', () => {
     it('should load data from storage when available', () => {
       const storedData = JSON.stringify({
         deviceId: 'device-test-1',
-        distinctId: 'visitor-test-1',
+        distinctId: 'anonymous-test-1',
         anonymousId: null,
         sessionId: 'session-test-1',
         lastEventAt: '2023-01-01T00:00:00.000Z',
@@ -409,7 +409,7 @@ describe('SessionManager with tracking consent', () => {
       sessionManager.init();
 
       expect(sessionManager.getDeviceId()).toBe('device-test-1');
-      expect(sessionManager.getDistinctId()).toBe('visitor-test-1');
+      expect(sessionManager.getDistinctId()).toBe('anonymous-test-1');
       expect(sessionManager.getSessionId()).toBe('session-test-1');
       expect(sessionManager.getLastEventAt()).toBe('2023-01-01T00:00:00.000Z');
     });
@@ -435,7 +435,7 @@ describe('SessionManager with tracking consent', () => {
 
     it('should generate missing IDs when partial data exists', () => {
       const storedData = JSON.stringify({
-        distinctId: 'visitor-test-1',
+        distinctId: 'anonymous-test-1',
         // deviceId and sessionId are missing
       });
 
@@ -449,7 +449,7 @@ describe('SessionManager with tracking consent', () => {
       });
       sessionManager.init();
 
-      expect(sessionManager.getDistinctId()).toBe('visitor-test-1');
+      expect(sessionManager.getDistinctId()).toBe('anonymous-test-1');
       expect(sessionManager.getDeviceId()).toMatch(PREFIX_DEVICE_ID);
       expect(sessionManager.getSessionId()).toMatch(PREFIX_SESSION_ID);
     });
@@ -480,7 +480,7 @@ describe('SessionManager with tracking consent', () => {
 
     it('should return distinct ID', () => {
       const distinctId = sessionManager.getDistinctId();
-      expect(distinctId).toMatch(PREFIX_VISITOR_ID);
+      expect(distinctId).toMatch(PREFIX_ANONYMOUS_ID);
       expect(typeof distinctId).toBe('string');
     });
 
@@ -489,7 +489,7 @@ describe('SessionManager with tracking consent', () => {
 
       sessionManager.identify('user123');
       const anonymousId = sessionManager.getAnonymousId();
-      expect(anonymousId).toMatch(PREFIX_VISITOR_ID);
+      expect(anonymousId).toMatch(PREFIX_ANONYMOUS_ID);
     });
 
     it('should return last event timestamp', () => {
@@ -600,7 +600,7 @@ describe('SessionManager with tracking consent', () => {
 
       expect(sessionManager.isIdentified()).toBe(false);
       expect(sessionManager.getAnonymousId()).toBe(null);
-      expect(sessionManager.getDistinctId()).toMatch(PREFIX_VISITOR_ID);
+      expect(sessionManager.getDistinctId()).toMatch(PREFIX_ANONYMOUS_ID);
       expect(sessionManager.getSessionId()).not.toBe(initialSessionId);
       expect(sessionManager.getSessionId()).toMatch(PREFIX_SESSION_ID);
       expect(sessionManager.getLastEventAt()).toBe(null);
diff --git a/packages/altertable-react/README.md b/packages/altertable-react/README.md
index b80e4cc..33635e4 100644
--- a/packages/altertable-react/README.md
+++ b/packages/altertable-react/README.md
@@ -81,7 +81,7 @@ function SignupPage() {
 ## Features
 
 - **Automatic page view tracking** – Captures page views automatically
-- **Session management** – Handles visitor and session IDs automatically
+- **Session management** – Handles anonymous and session IDs automatically
 - **Event queuing** – Queues events when offline or consent is pending
 - **Privacy compliance** – Built-in tracking consent management
 - **Multiple storage options** – localStorage, cookies, or both