diff --git a/.gitignore b/.gitignore
index 5d6f093..7b0f2e4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,3 +4,4 @@ dist/
 node_modules/
 package-lock.json
 yarn.lock
+*.DS_Store
\ No newline at end of file
diff --git a/src/api/controllers/NotifController.ts b/src/api/controllers/NotifController.ts
index 6a3f79f..1b3dcfc 100644
--- a/src/api/controllers/NotifController.ts
+++ b/src/api/controllers/NotifController.ts
@@ -1,5 +1,5 @@
-import { JsonController, Post } from 'routing-controllers';
-import { ExpoPushMessage, PushTicket } from 'src/types';
+import { Body, CurrentUser, Delete, Get, JsonController, Params, Post } from 'routing-controllers';
+import { ExpoPushMessage, PushTicket, FindTokensRequest } from 'src/types';
 import { NotifService } from '../../services/NotifService';
 
 @JsonController('notif/')
@@ -11,7 +11,8 @@ export class NotifController {
     }
 
     @Post()
-    async sendPost( notifRequest : ExpoPushMessage ) {
-        return this.notifService.sendNotifs(notifRequest, {});
+    async sendNotif(@Body() findTokensRequest: FindTokensRequest) {
+      return this.notifService.sendNotifs(findTokensRequest);
     }
-}
\ No newline at end of file
+}
+
diff --git a/src/api/controllers/PostController.ts b/src/api/controllers/PostController.ts
index 21707de..e8fedb2 100644
--- a/src/api/controllers/PostController.ts
+++ b/src/api/controllers/PostController.ts
@@ -98,8 +98,13 @@ export class PostController {
     return { isSaved: await this.postService.isSavedPost(user, params) };
   }
 
-  @Post('edit/postID/:id/')
+  @Post('edit/postId/:id/')
   async editPrice(@Body() editPriceRequest: EditPostPriceRequest, @CurrentUser() user: UserModel, @Params() params: UuidParam): Promise<EditPriceResponse> {
     return { new_price: await (await this.postService.editPostPrice(user, params, editPriceRequest)).altered_price };
   }
+
+  @Get('similar/postId/:id/')
+  async similarPosts(@Params() params: UuidParam): Promise<GetPostsResponse> {
+    return { posts: await this.postService.similarPosts(params) };
+  }
 }
\ No newline at end of file
diff --git a/src/api/controllers/UserController.ts b/src/api/controllers/UserController.ts
index 0c95b02..810580e 100644
--- a/src/api/controllers/UserController.ts
+++ b/src/api/controllers/UserController.ts
@@ -2,7 +2,7 @@ import { Body, CurrentUser, Get, JsonController, Param, Params, Post } from 'rou
 
 import { UserModel } from '../../models/UserModel';
 import { UserService } from '../../services/UserService';
-import { EditProfileRequest, GetUserByEmailRequest, GetUserResponse, GetUsersResponse, SetAdminByEmailRequest } from '../../types';
+import { EditProfileRequest, GetUserByEmailRequest, GetUserResponse, GetUsersResponse, SaveTokenRequest, SetAdminByEmailRequest } from '../../types';
 import { UuidParam } from '../validators/GenericRequests';
 
 @JsonController('user/')
diff --git a/src/api/controllers/index.ts b/src/api/controllers/index.ts
index 88c0feb..859e787 100644
--- a/src/api/controllers/index.ts
+++ b/src/api/controllers/index.ts
@@ -5,11 +5,13 @@ import { PostController } from './PostController';
 import { RequestController } from './RequestController';
 import { UserController } from './UserController';
 import { UserReviewController } from './UserReviewController';
+import { NotifController } from './NotifController'
 
 export const controllers = [
   AuthController,
   FeedbackController,
   ImageController,
+  NotifController,
   PostController,
   RequestController,
   UserController,
diff --git a/src/api/validators/AuthControllerRequests.ts b/src/api/validators/AuthControllerRequests.ts
index 608e1ff..c4c521b 100644
--- a/src/api/validators/AuthControllerRequests.ts
+++ b/src/api/validators/AuthControllerRequests.ts
@@ -8,4 +8,7 @@ export class LoginRequest implements AuthRequest {
 
     @IsDefined()
     user: GoogleLoginUser;
+
+    @IsDefined()
+    deviceToken: string;
 }
\ No newline at end of file
diff --git a/src/migrations/0001_AddDeviceTokenForUser.ts b/src/migrations/0001_AddDeviceTokenForUser.ts
new file mode 100644
index 0000000..39d29ca
--- /dev/null
+++ b/src/migrations/0001_AddDeviceTokenForUser.ts
@@ -0,0 +1,21 @@
+import { MigrationInterface, QueryRunner, TableColumn } from "typeorm";
+
+const TABLE_NAME = "User";
+
+export class AddDeviceTokenForUser1682226973547 implements MigrationInterface {
+    public async up(queryRunner: QueryRunner): Promise<void> {
+        // add device token for user table
+        await queryRunner.addColumn(
+          TABLE_NAME,
+          new TableColumn({
+            name: "deviceTokens",
+            type: "text[]",
+            default: 'array[]::text[]',
+          })
+        );
+      }
+    
+      public async down(queryRunner: QueryRunner): Promise<void> {
+        await queryRunner.dropColumn(TABLE_NAME, "deviceTokens");
+      }
+}
\ No newline at end of file
diff --git a/src/migrations/0003_AddDeviceTokenToSession.ts b/src/migrations/0003_AddDeviceTokenToSession.ts
new file mode 100644
index 0000000..f34b6e7
--- /dev/null
+++ b/src/migrations/0003_AddDeviceTokenToSession.ts
@@ -0,0 +1,22 @@
+import {MigrationInterface, QueryRunner, TableColumn} from "typeorm";
+
+const TABLE_NAME = "UserSession"
+
+export class AddDeviceTokenToSession1682461409919 implements MigrationInterface {
+
+    public async up(queryRunner: QueryRunner): Promise<void> {
+        await queryRunner.addColumn(
+            TABLE_NAME,
+            new TableColumn({
+              name: "deviceToken",
+              type: "text",
+              default: "''"
+            })
+          );
+    }
+
+    public async down(queryRunner: QueryRunner): Promise<void> {
+        await queryRunner.dropColumn(TABLE_NAME, "deviceToken");
+    }
+
+}
diff --git a/src/migrations/0004_RemoveDeviceTokenForUser.ts b/src/migrations/0004_RemoveDeviceTokenForUser.ts
new file mode 100644
index 0000000..8645088
--- /dev/null
+++ b/src/migrations/0004_RemoveDeviceTokenForUser.ts
@@ -0,0 +1,22 @@
+import { MigrationInterface, QueryRunner, TableColumn } from 'typeorm';
+
+const TABLE_NAME = "User";
+
+export class RemoveDeviceTokenForUser1683322987029 implements MigrationInterface {
+
+    public async up(queryRunner: QueryRunner): Promise<void> {
+        await queryRunner.dropColumn(TABLE_NAME, "deviceTokens");
+    }
+
+    public async down(queryRunner: QueryRunner): Promise<void> {
+        // add device token for user table
+        await queryRunner.addColumn(
+            TABLE_NAME,
+            new TableColumn({
+                name: "deviceTokens",
+                type: "text[]",
+                default: 'array[]::text[]',
+            })
+        );
+    }
+}
diff --git a/src/models/UserSessionModel.ts b/src/models/UserSessionModel.ts
index 3031a78..9c91ece 100644
--- a/src/models/UserSessionModel.ts
+++ b/src/models/UserSessionModel.ts
@@ -19,6 +19,9 @@ export class UserSessionModel {
   @Column()
   refreshToken: string;
 
+  @Column("text", { default: "", nullable: false, })
+  deviceToken: string;
+
   @ManyToOne(() => UserModel, user => user.sessions, { onDelete: "CASCADE" })
   @JoinColumn({ name: 'user' })
   user: UserModel;
@@ -43,6 +46,7 @@ export class UserSessionModel {
       active: this.expiresAt.getTime() > Date.now(),
       expiresAt: this.expiresAt.getTime(),
       refreshToken: this.refreshToken,
+      deviceToken: this.deviceToken
     };
   }
 
diff --git a/src/repositories/UserRepository.ts b/src/repositories/UserRepository.ts
index d0379d2..22cdb4b 100644
--- a/src/repositories/UserRepository.ts
+++ b/src/repositories/UserRepository.ts
@@ -102,7 +102,7 @@ export class UserRepository extends AbstractRepository<UserModel> {
     username: string | undefined,
     photoUrl: string | undefined,
     venmoHandle: string | undefined,
-    bio: string | undefined
+    bio: string | undefined,
   ): Promise<UserModel> {
     const existingUser = this.repository
       .createQueryBuilder("user")
diff --git a/src/repositories/UserSessionRepository.ts b/src/repositories/UserSessionRepository.ts
index 7b6d5f1..d46d964 100644
--- a/src/repositories/UserSessionRepository.ts
+++ b/src/repositories/UserSessionRepository.ts
@@ -100,6 +100,11 @@ export class UserSessionRepository extends AbstractRepository<UserSessionModel>
     return session;
   }
 
+  public async updateSessionDeviceToken(session: UserSessionModel, deviceToken: string): Promise<UserSessionModel> {
+    session.deviceToken = deviceToken;
+    return await this.repository.save(session);
+  }
+
   public async verifySession(accessToken: string): Promise<boolean> {
     const session = await this.repository
       .createQueryBuilder("UserSessionModel")
diff --git a/src/services/AuthService.ts b/src/services/AuthService.ts
index babdf3a..e269b1f 100644
--- a/src/services/AuthService.ts
+++ b/src/services/AuthService.ts
@@ -68,8 +68,9 @@ export class AuthService {
             user = await userRepository.createUser(netid, netid, newUser.givenName, newUser.familyName,
               newUser.photoUrl, newUser.email, userId);
           }
-          // since they're logging in, create a new session for them
-          const session = sessionsRepository.createSession(user);
+          //add device token
+          const session = await sessionsRepository.createSession(user);  
+          sessionsRepository.updateSessionDeviceToken(session, authRequest.deviceToken)        
           return session;
         });
       }
diff --git a/src/services/NotifService.ts b/src/services/NotifService.ts
index 1b7cf11..184d7cf 100644
--- a/src/services/NotifService.ts
+++ b/src/services/NotifService.ts
@@ -1,50 +1,84 @@
+import { NotFoundError} from 'routing-controllers';
 import { Service } from 'typedi';
-
-import { ExpoPushMessage, PushTicket } from '../types';
+import { ExpoPushMessage, PushTicket, FindTokensRequest, NotifSent } from '../types';
 import { Expo } from 'expo-server-sdk';
-
+import { UserRepository } from 'src/repositories/UserRepository';
+import Repositories, { TransactionsManager } from '../repositories';
+import { EntityManager } from 'typeorm';
+import { InjectManager } from 'typeorm-typedi-extensions';
 var accessToken = process.env['EXPO_ACCESS_TOKEN']
 const expoServer = new Expo({ accessToken: accessToken });
 
+
 @Service()
 export class NotifService {
-// /**
+    private transactions: TransactionsManager;
+
+    constructor(@InjectManager() entityManager: EntityManager) {
+        this.transactions = new TransactionsManager(entityManager);
+    }
+
+    // /**
 //  * Takes an array of notifications and sends them to users in batches (called chunks)
 //  * @param {NotifObject[]} notifs an array of notification objects
 //  * @param {Object} expoServer the server object to connect with
 //  */
- public sendNotifChunks = async (notifs : ExpoPushMessage[], expoServer : Expo) => {
-    let chunks = expoServer.chunkPushNotifications(notifs);
-    let tickets = [];
 
-    for (let chunk of chunks) {
-        try {
-            let ticketChunk = await expoServer.sendPushNotificationsAsync(chunk);
-            // store tickets to check for notif status later
-            tickets.push(...ticketChunk);
-        } catch (err) {
-            console.log("Error while sending notif chunk");
+    public sendNotifChunks = async (notifs : ExpoPushMessage[], expoServer : Expo) => {
+        let chunks = expoServer.chunkPushNotifications(notifs);
+        let tickets = [];
+
+        for (let chunk of chunks) {
+            try {
+                let ticketChunk = await expoServer.sendPushNotificationsAsync(chunk);
+                // store tickets to check for notif status later
+                tickets.push(...ticketChunk);
+            } catch (err) {
+                console.log("Error while sending notif chunk");
+            }
+            console.log(tickets);
         }
-        console.log(tickets);
     }
-}
 
-public sendNotifs = (notif : ExpoPushMessage, json = {}) => {
-    try {
-        let notifs : ExpoPushMessage[] = [];
-        notif.to.forEach(token => {
-            notifs.push({
-                to: notif.to,
-                sound: notif.sound,
-                title: notif.title,
-                body: notif.body,
-                data: notif.data
-            })
+    public async sendNotifs(request: FindTokensRequest) {
+        return this.transactions.readWrite(async (transactionalEntityManager) => {
+            const userRepository = Repositories.user(transactionalEntityManager);
+            const userSessionRepository = Repositories.session(transactionalEntityManager);
+            let user = await userRepository.getUserByEmail(request.email);
+            if (!user) {
+                throw new NotFoundError("User not found!");
+            }
+            const allDeviceTokens = [];
+            const allsessions = await userSessionRepository.getSessionsByUserId(user.id);
+            for (var sess of allsessions) {
+                if (sess.deviceToken) {
+                allDeviceTokens.push(sess.deviceToken); }
+            }
+            let notif: ExpoPushMessage= 
+                {
+                    to: allDeviceTokens,
+                    sound: 'default',
+                    title: request.title,
+                    body: request.body,
+                    data: request.data
+                }
+            try {
+                let notifs : ExpoPushMessage[] = [];
+                notif.to.forEach(token => {
+                    notifs.push({
+                        to: [token],
+                        sound: notif.sound,
+                        title: notif.title,
+                        body: notif.body,
+                        data: notif.data
+                    })
+                })
+                this.sendNotifChunks(notifs, expoServer)
+            }
+            
+            // Simply do nothing if the user has no tokens
+            catch (err) { 
+                console.log(err) }
         })
-
-        this.sendNotifChunks(notifs, expoServer)
     }
-    // Simply do nothing if the user has no tokens
-    catch (err) { console.log(err) }
-}
 }
\ No newline at end of file
diff --git a/src/services/PostService.ts b/src/services/PostService.ts
index 23ae2c2..ec232e7 100644
--- a/src/services/PostService.ts
+++ b/src/services/PostService.ts
@@ -223,5 +223,33 @@ export class PostService {
     }, 0);
     return result;
   }
+
+  public async similarPosts(params: UuidParam): Promise<PostModel[]> {
+    return this.transactions.readOnly(async (transactionalEntityManager) => {
+      const postRepository = Repositories.post(transactionalEntityManager);
+      const post = await postRepository.getPostById(params.id);
+      if (!post) throw new NotFoundError('Post not found!');
+      const allPosts = await postRepository.getAllPosts();
+      let posts: PostModel[] = []
+      const model = await getLoadedModel();
+      for (const p of allPosts) {
+        if (post.id != p.id) {
+          const sentences = [
+            post.title,
+            p.title
+          ];
+          await model.embed(sentences).then(async (embeddings: any) => {
+            embeddings = embeddings.arraySync()
+            const a = embeddings[0];
+            const b = embeddings[1];
+            if (this.similarity(a, b) >= 0.5) {
+              posts.push(p)
+            }
+          });
+        }
+      }
+      return posts
+    });
+  }
 }
 
diff --git a/src/services/UserService.ts b/src/services/UserService.ts
index 36150da..2277ccd 100644
--- a/src/services/UserService.ts
+++ b/src/services/UserService.ts
@@ -6,7 +6,7 @@ import { InjectManager } from 'typeorm-typedi-extensions';
 import { UuidParam } from '../api/validators/GenericRequests';
 import { UserModel } from '../models/UserModel';
 import Repositories, { TransactionsManager } from '../repositories';
-import { EditProfileRequest, SetAdminByEmailRequest } from '../types';
+import { EditProfileRequest, SaveTokenRequest, SetAdminByEmailRequest } from '../types';
 import { uploadImage } from '../utils/Requests';
 
 @Service()
diff --git a/src/types/ApiRequests.ts b/src/types/ApiRequests.ts
index 0bbbb63..074e195 100644
--- a/src/types/ApiRequests.ts
+++ b/src/types/ApiRequests.ts
@@ -16,6 +16,7 @@ export interface GoogleLoginUser {
 export interface AuthRequest {
     idToken: string;
     user: GoogleLoginUser;
+    deviceToken: string;
 }
 
 export interface EditProfileRequest {
@@ -114,9 +115,21 @@ export interface CreateUserReviewRequest {
 // NOTIFICATION
 export interface ExpoPushMessage {
     to: string[];
-    sound: 'default' | null;
+    //special type for ExpoPushMessage
+    sound: 'default';
     title: string;
     body: string;
     data: JSON;
 }
 
+export interface SaveTokenRequest {
+    token: string;
+    userId: Uuid;
+}
+
+export interface FindTokensRequest {
+    email: string;
+    title: string;
+    body: string;
+    data: JSON;
+}
diff --git a/src/types/ApiResponses.ts b/src/types/ApiResponses.ts
index 0f3b297..e653c1a 100644
--- a/src/types/ApiResponses.ts
+++ b/src/types/ApiResponses.ts
@@ -156,21 +156,20 @@ export interface GetUserReviewsResponse {
 export interface PushTicketData {
     status: string,
     id: string,
-    message: string
-    details: JSON
+    message: string,
+    details: JSON,
 }
 
 export interface PushTicketErrorData {
     code: string,
-    message: string
+    message: string,
 }
 
 export interface PushTicket {
     data: PushTicketData[],
-    errors: PushTicketErrorData[]
+    errors: PushTicketErrorData[],
 }
 
-export interface SaveTokenRequest {
-    token: string, 
-    email: string
-}
\ No newline at end of file
+export interface NotifSent {
+    status: string,
+}
diff --git a/src/types/Miscellaneous.ts b/src/types/Miscellaneous.ts
index b02c5d6..379627e 100644
--- a/src/types/Miscellaneous.ts
+++ b/src/types/Miscellaneous.ts
@@ -4,6 +4,7 @@ export type APIUserSession = {
     refreshToken: string,
     active: boolean,
     expiresAt: number,
+    deviceToken: string
   }
 
   export enum Category {