diff --git a/apps/sdk-api/src/controllers/event.controller.ts b/apps/sdk-api/src/controllers/event.controller.ts
index df11541a..30904977 100644
--- a/apps/sdk-api/src/controllers/event.controller.ts
+++ b/apps/sdk-api/src/controllers/event.controller.ts
@@ -42,7 +42,7 @@ function parsePath(path?: string): {
     return {
       query: parseSearchParams(url.searchParams),
       path: url.pathname,
-      hash: url.hash ?? undefined,
+      hash: url.hash || undefined,
     };
   } catch (error) {
     return {
@@ -69,15 +69,18 @@ export async function postEvent(
   reply: FastifyReply
 ) {
   let deviceId: string | null = null;
-  const projectId = request.projectId;
-  const body = request.body;
+  const { projectId, body } = request;
+  const properties = body.properties ?? {};
+  const getProperty = (name: string): string | undefined => {
+    return (properties[name] as string | null | undefined) ?? undefined;
+  };
   const profileId = body.profileId ?? '';
   const createdAt = new Date(body.timestamp);
-  const url = body.properties?.path;
+  const url = getProperty('__path');
   const { path, hash, query } = parsePath(url);
-  const referrer = isSameDomain(body.properties?.referrer, url)
+  const referrer = isSameDomain(getProperty('__referrer'), url)
     ? null
-    : parseReferrer(body.properties?.referrer);
+    : parseReferrer(getProperty('__referrer'));
   const utmReferrer = getReferrerWithQuery(query);
   const ip = getClientIp(request)!;
   const origin = request.headers.origin!;
@@ -112,7 +115,14 @@ export async function postEvent(
         sessionId: event?.sessionId || '',
         profileId,
         projectId,
-        properties: body.properties ?? {},
+        properties: Object.assign(
+          {},
+          omit(['__path', '__referrer'], properties),
+          {
+            hash,
+            query,
+          }
+        ),
         createdAt,
         country: event?.country ?? '',
         city: event?.city ?? '',
@@ -205,7 +215,7 @@ export async function postEvent(
     profileId,
     projectId,
     sessionId: createSessionStart ? uuid() : sessionStartEvent?.sessionId ?? '',
-    properties: Object.assign({}, omit(['path', 'referrer'], body.properties), {
+    properties: Object.assign({}, omit(['__path', '__referrer'], properties), {
       hash,
       query,
     }),
diff --git a/packages/db/src/services/event.service.ts b/packages/db/src/services/event.service.ts
index 5530395c..88247e5b 100644
--- a/packages/db/src/services/event.service.ts
+++ b/packages/db/src/services/event.service.ts
@@ -191,10 +191,6 @@ export async function createEvent(
     });
   }
 
-  if (payload.properties.hash === '') {
-    delete payload.properties.hash;
-  }
-
   const event: IClickhouseEvent = {
     id: uuid(),
     name: payload.name,
diff --git a/packages/sdk-native/index.ts b/packages/sdk-native/index.ts
index 9d27e89c..795e742b 100644
--- a/packages/sdk-native/index.ts
+++ b/packages/sdk-native/index.ts
@@ -4,6 +4,7 @@ import Constants from 'expo-constants';
 
 import type { MixanOptions } from '@mixan/sdk';
 import { Mixan } from '@mixan/sdk';
+import type { PostEventPayload } from '@mixan/types';
 
 type MixanNativeOptions = MixanOptions;
 
@@ -24,19 +25,22 @@ export class MixanNative extends Mixan<MixanNativeOptions> {
 
   private async setProperties() {
     this.setGlobalProperties({
-      version: Application.nativeApplicationVersion,
-      buildNumber: Application.nativeBuildVersion,
-      referrer:
+      __version: Application.nativeApplicationVersion,
+      __buildNumber: Application.nativeBuildVersion,
+      __referrer:
         Platform.OS === 'android'
           ? await Application.getInstallReferrerAsync()
           : undefined,
     });
   }
 
-  public screenView(route: string, properties?: Record<string, unknown>): void {
+  public screenView(
+    route: string,
+    properties?: PostEventPayload['properties']
+  ): void {
     super.event('screen_view', {
       ...properties,
-      path: route,
+      __path: route,
     });
   }
 }
diff --git a/packages/sdk-next/index.tsx b/packages/sdk-next/index.tsx
index 303eabfc..2b3e9cf0 100644
--- a/packages/sdk-next/index.tsx
+++ b/packages/sdk-next/index.tsx
@@ -1,8 +1,11 @@
 import Script from 'next/script';
 
-import type { MixanEventOptions } from '@mixan/sdk';
 import type { MixanWebOptions } from '@mixan/sdk-web';
-import type { UpdateProfilePayload } from '@mixan/types';
+import type {
+  MixanEventOptions,
+  PostEventPayload,
+  UpdateProfilePayload,
+} from '@mixan/types';
 
 const CDN_URL = 'http://localhost:3002/op.js';
 
@@ -73,11 +76,14 @@ export function SetProfileId({ value }: SetProfileIdProps) {
   );
 }
 
-export function trackEvent(name: string, data?: Record<string, unknown>) {
+export function trackEvent(
+  name: string,
+  data?: PostEventPayload['properties']
+) {
   window.op('event', name, data);
 }
 
-export function trackScreenView(data?: Record<string, unknown>) {
+export function trackScreenView(data?: PostEventPayload['properties']) {
   trackEvent('screen_view', data);
 }
 
diff --git a/packages/sdk-web/index.ts b/packages/sdk-web/index.ts
index 182acc8a..4e6a7b05 100644
--- a/packages/sdk-web/index.ts
+++ b/packages/sdk-web/index.ts
@@ -1,5 +1,6 @@
 import type { MixanOptions } from '@mixan/sdk';
 import { Mixan } from '@mixan/sdk';
+import type { PostEventPayload } from '@mixan/types';
 
 export type MixanWebOptions = MixanOptions & {
   trackOutgoingLinks?: boolean;
@@ -22,7 +23,7 @@ export class MixanWeb extends Mixan<MixanWebOptions> {
 
     if (!this.isServer()) {
       this.setGlobalProperties({
-        referrer: document.referrer,
+        __referrer: document.referrer,
       });
 
       if (this.options.trackOutgoingLinks) {
@@ -134,7 +135,7 @@ export class MixanWeb extends Mixan<MixanWebOptions> {
     });
   }
 
-  public screenView(properties?: Record<string, unknown>): void {
+  public screenView(properties?: PostEventPayload['properties']): void {
     if (this.isServer()) {
       return;
     }
@@ -148,8 +149,8 @@ export class MixanWeb extends Mixan<MixanWebOptions> {
     this.lastPath = path;
     super.event('screen_view', {
       ...(properties ?? {}),
-      path,
-      title: document.title,
+      __path: path,
+      __title: document.title,
     });
   }
 }
diff --git a/packages/sdk/index.ts b/packages/sdk/index.ts
index 33d160f1..fa120908 100644
--- a/packages/sdk/index.ts
+++ b/packages/sdk/index.ts
@@ -1,6 +1,7 @@
 import type {
   DecrementProfilePayload,
   IncrementProfilePayload,
+  MixanEventOptions,
   PostEventPayload,
   UpdateProfilePayload,
 } from '@mixan/types';
@@ -21,10 +22,6 @@ export interface MixanState {
   properties: Record<string, unknown>;
 }
 
-export interface MixanEventOptions {
-  profileId?: string;
-}
-
 function awaitProperties(
   properties: Record<string, string | Promise<string | null>>
 ): Promise<Record<string, string>> {
@@ -168,10 +165,7 @@ export class Mixan<Options extends MixanOptions = MixanOptions> {
     });
   }
 
-  public event(
-    name: string,
-    properties?: Record<string, unknown> & MixanEventOptions
-  ) {
+  public event(name: string, properties?: PostEventPayload['properties']) {
     const profileId = properties?.profileId ?? this.state.profileId;
     delete properties?.profileId;
     this.api
@@ -200,7 +194,6 @@ export class Mixan<Options extends MixanOptions = MixanOptions> {
   }
 
   public clear() {
-    this.state.properties = {};
     this.state.deviceId = undefined;
     this.state.profileId = undefined;
     if (this.options.removeDeviceId) {
diff --git a/packages/sdk/index_old.ts b/packages/sdk/index_old.ts
deleted file mode 100644
index 4c42831e..00000000
--- a/packages/sdk/index_old.ts
+++ /dev/null
@@ -1,360 +0,0 @@
-import type {
-  EventPayload,
-  MixanErrorResponse,
-  ProfilePayload,
-} from '@mixan/types';
-
-export interface NewMixanOptions {
-  url: string;
-  clientId: string;
-  clientSecret: string;
-  batchInterval?: number;
-  maxBatchSize?: number;
-  sessionTimeout?: number;
-  session?: boolean;
-  verbose?: boolean;
-  profile?: boolean;
-  trackIp?: boolean;
-  setItem: (key: string, profileId: string) => void;
-  getItem: (key: string) => string | null;
-  removeItem: (key: string) => void;
-}
-export type MixanOptions = Required<NewMixanOptions>;
-
-class Fetcher {
-  private url: string;
-  private clientId: string;
-  private clientSecret: string;
-  private logger: (...args: any[]) => void;
-
-  constructor(options: MixanOptions) {
-    this.url = options.url;
-    this.clientId = options.clientId;
-    this.clientSecret = options.clientSecret;
-    this.logger = options.verbose ? console.log : () => {};
-  }
-
-  post<PostData, PostResponse>(
-    path: string,
-    data?: PostData,
-    options?: RequestInit
-  ): Promise<PostResponse | null> {
-    const url = `${this.url}${path}`;
-    this.logger(`Mixan request: ${url}`, JSON.stringify(data, null, 2));
-
-    return fetch(url, {
-      headers: {
-        ['mixan-client-id']: this.clientId,
-        ['mixan-client-secret']: this.clientSecret,
-        'Content-Type': 'application/json',
-      },
-      method: 'POST',
-      body: JSON.stringify(data ?? {}),
-      keepalive: true,
-      ...(options ?? {}),
-    })
-      .then(async (res) => {
-        const response = (await res.json()) as
-          | MixanErrorResponse
-          | PostResponse;
-
-        if (!response) {
-          return null;
-        }
-
-        if (
-          typeof response === 'object' &&
-          'status' in response &&
-          response.status === 'error'
-        ) {
-          this.logger(
-            `Mixan request failed: [${options?.method ?? 'POST'}] ${url}`,
-            JSON.stringify(response, null, 2)
-          );
-          return null;
-        }
-
-        return response as PostResponse;
-      })
-      .catch(() => {
-        this.logger(
-          `Mixan request failed: [${options?.method ?? 'POST'}] ${url}`
-        );
-        return null;
-      });
-  }
-}
-
-class Batcher<T> {
-  queue: T[] = [];
-  timer?: ReturnType<typeof setTimeout>;
-  callback: (queue: T[]) => void;
-  maxBatchSize: number;
-  batchInterval: number;
-
-  constructor(options: MixanOptions, callback: (queue: T[]) => void) {
-    this.callback = callback;
-    this.maxBatchSize = options.maxBatchSize;
-    this.batchInterval = options.batchInterval;
-  }
-
-  add(payload: T) {
-    this.queue.push(payload);
-    this.flush();
-  }
-
-  flush() {
-    if (this.timer) {
-      clearTimeout(this.timer);
-    }
-
-    if (this.queue.length === 0) {
-      return;
-    }
-
-    if (this.queue.length >= this.maxBatchSize) {
-      this.send();
-      return;
-    }
-
-    this.timer = setTimeout(this.send.bind(this), this.batchInterval);
-  }
-
-  send() {
-    if (this.timer) {
-      clearTimeout(this.timer);
-    }
-
-    if (this.queue.length > 0) {
-      this.callback(this.queue);
-      this.queue = [];
-    }
-  }
-}
-
-export class Mixan {
-  private fetch: Fetcher;
-  private eventBatcher: Batcher<EventPayload>;
-  private profileId?: string;
-  private options: MixanOptions;
-  private logger: (...args: any[]) => void;
-  private globalProperties: Record<string, unknown> = {};
-  private lastEventAt: string;
-  private promiseIp: Promise<string | null>;
-
-  constructor(options: NewMixanOptions) {
-    this.logger = options.verbose ? console.log : () => {};
-    this.options = {
-      sessionTimeout: 1000 * 60 * 30,
-      session: true,
-      verbose: false,
-      batchInterval: 10000,
-      maxBatchSize: 10,
-      trackIp: false,
-      profile: true,
-      ...options,
-    };
-
-    this.lastEventAt =
-      this.options.getItem('@mixan:lastEventAt') ?? '1970-01-01';
-    this.fetch = new Fetcher(this.options);
-    this.eventBatcher = new Batcher(this.options, (queue) => {
-      this.fetch.post(
-        '/events',
-        queue.map((item) => ({
-          ...item,
-          properties: {
-            ...this.globalProperties,
-            ...item.properties,
-          },
-          profileId: item.profileId ?? this.profileId ?? null,
-        }))
-      );
-    });
-
-    this.promiseIp = this.options.trackIp
-      ? fetch('https://api.ipify.org')
-          .then((res) => res.text())
-          .catch(() => null)
-      : Promise.resolve(null);
-  }
-
-  async ip() {
-    return this.promiseIp;
-  }
-
-  timestamp(modify = 0) {
-    return new Date(Date.now() + modify).toISOString();
-  }
-
-  init(properties?: Record<string, unknown>) {
-    if (properties) {
-      this.setGlobalProperties(properties);
-    }
-    this.logger('Mixan: Init');
-    this.setAnonymousUser();
-  }
-
-  event(name: string, properties: Record<string, unknown> = {}) {
-    const now = new Date();
-    const isSessionStart =
-      this.options.session &&
-      now.getTime() - new Date(this.lastEventAt).getTime() >
-        this.options.sessionTimeout;
-
-    if (isSessionStart) {
-      this.logger('Mixan: Session start');
-      this.eventBatcher.add({
-        name: 'session_start',
-        time: this.timestamp(-10),
-        properties: {},
-        profileId: this.profileId ?? null,
-      });
-    }
-
-    this.logger('Mixan: Queue event', name);
-    this.eventBatcher.add({
-      name,
-      properties,
-      time: this.timestamp(),
-      profileId: this.profileId ?? null,
-    });
-    this.lastEventAt = this.timestamp();
-    this.options.setItem('@mixan:lastEventAt', this.lastEventAt);
-  }
-
-  private async setAnonymousUser(retryCount = 0) {
-    if (!this.options.profile) {
-      return;
-    }
-    const profileId = this.options.getItem('@mixan:profileId');
-    if (profileId) {
-      this.profileId = profileId;
-      await this.setUser({
-        properties: this.globalProperties,
-      });
-      this.logger('Mixan: Use existing profile', this.profileId);
-    } else {
-      const res = await this.fetch.post<ProfilePayload, { id: string }>(
-        '/profiles',
-        {
-          properties: this.globalProperties,
-        }
-      );
-
-      if (res) {
-        this.profileId = res.id;
-        this.options.setItem('@mixan:profileId', res.id);
-        this.logger('Mixan: Create new profile', this.profileId);
-      } else if (retryCount < 2) {
-        setTimeout(() => {
-          this.setAnonymousUser(retryCount + 1);
-        }, 500);
-      } else {
-        this.logger('Mixan: Failed to create new profile');
-      }
-    }
-  }
-
-  async setUser(profile: ProfilePayload) {
-    if (!this.options.profile) {
-      return;
-    }
-    if (!this.profileId) {
-      return this.logger('Mixan: Set user failed, no profileId');
-    }
-    this.logger('Mixan: Set user', profile);
-    await this.fetch.post(`/profiles/${this.profileId}`, profile, {
-      method: 'PUT',
-    });
-  }
-
-  async setUserProperty(
-    name: string,
-    value: string | number | boolean | Record<string, unknown> | unknown[]
-  ) {
-    if (!this.options.profile) {
-      return;
-    }
-    if (!this.profileId) {
-      return this.logger('Mixan: Set user property, no profileId');
-    }
-    this.logger('Mixan: Set user property', name, value);
-    await this.fetch.post(`/profiles/${this.profileId}`, {
-      properties: {
-        [name]: value,
-      },
-    });
-  }
-
-  setGlobalProperties(properties: Record<string, unknown>) {
-    if (typeof properties !== 'object') {
-      return this.logger(
-        'Mixan: Set global properties failed, properties must be an object'
-      );
-    }
-    this.logger('Mixan: Set global properties', properties);
-    this.globalProperties = {
-      ...this.globalProperties,
-      ...properties,
-    };
-  }
-
-  async increment(name: string, value = 1) {
-    if (!this.options.profile) {
-      return;
-    }
-    if (!this.profileId) {
-      this.logger('Mixan: Increment failed, no profileId');
-      return;
-    }
-
-    this.logger('Mixan: Increment user property', name, value);
-    await this.fetch.post(
-      `/profiles/${this.profileId}/increment`,
-      {
-        name,
-        value,
-      },
-      {
-        method: 'PUT',
-      }
-    );
-  }
-
-  async decrement(name: string, value = 1) {
-    if (!this.options.profile) {
-      return;
-    }
-    if (!this.profileId) {
-      this.logger('Mixan: Decrement failed, no profileId');
-      return;
-    }
-
-    this.logger('Mixan: Decrement user property', name, value);
-    await this.fetch.post(
-      `/profiles/${this.profileId}/decrement`,
-      {
-        name,
-        value,
-      },
-      {
-        method: 'PUT',
-      }
-    );
-  }
-
-  flush() {
-    this.logger('Mixan: Flushing events queue');
-    this.eventBatcher.send();
-  }
-
-  clear() {
-    this.logger('Mixan: Clear, send remaining events and remove profileId');
-    this.eventBatcher.send();
-    this.options.removeItem('@mixan:profileId');
-    this.options.removeItem('@mixan:lastEventAt');
-    this.profileId = undefined;
-    this.setAnonymousUser();
-  }
-}
diff --git a/packages/types/src/sdk.types.ts b/packages/types/src/sdk.types.ts
index 42785247..f228af92 100644
--- a/packages/types/src/sdk.types.ts
+++ b/packages/types/src/sdk.types.ts
@@ -134,16 +134,16 @@ export interface MixanResponse<T> {
 
 // NEW
 
+export interface MixanEventOptions {
+  profileId?: string;
+}
+
 export interface PostEventPayload {
   name: string;
   timestamp: string;
   deviceId?: string;
   profileId?: string;
-  properties?: Record<string, unknown> & {
-    title?: string | undefined;
-    referrer?: string | undefined;
-    path?: string | undefined;
-  };
+  properties?: Record<string, unknown> & MixanEventOptions;
 }
 
 export interface UpdateProfilePayload {