Steps to be followed in the backend:

  1. create an account on MongoDb official website

2. Fill this: as per your choice..

3. Select a plan, for now, select free one (shared)

4. will see as follow, continue with default settings:

5. provide a new username and password to create an user. Also add current ip address, then finish and close

6. Your account is ready, it will take a while to create a cluster. Finally, you will see following screen. -> where you can add your teammate to collaborate. -> create new database [with “browse collections” button] (see further instructions) -> create an app in “App services” tab

7. Go to “Browse Collections”, will get following page

8. Go to “Add My own Data” option, which will ask you database name and collection name, fill that and create a collection

9. Now go to the “App services” tab, select “build your own app”

10. Continue with default settings

11. App is created, you can see this page Now you have to add rule for data access and user authentication method

12. Go to “rule”, Yo can add customized rule for your data, for testing purpose, i’m giving access to everyone to read and write

13. Save your changes, Note that, saving and deploying is different thing so make sure you deploy your changes as shown below

14. Now go to “Authentication”, turn on the way you want to authenticate your users, for now i’m using “anonymous login” then save and deploy..

Now your backend is ready, go to android studio

Project Level Gradle file:

buildscript {
    repositories {
    dependencies {
        classpath "io.realm:realm-gradle-plugin:10.11.0"

plugins {
    id '' version '7.2.0' apply false
    id '' version '7.2.0' apply false
    id '' version '1.6.21' apply false
    id "org.jetbrains.kotlin.kapt" version "1.6.20" apply false

task clean(type: Delete) {
    delete rootProject.buildDir

app levele gradle file

plugins {
    id ''
    id ''
    id 'org.jetbrains.kotlin.kapt'

apply plugin: "realm-android"

android {
    compileSdk 32

    defaultConfig {
        applicationId "com.ihrsachin.mongodbrealmforandroid"
        minSdk 21
        targetSdk 32
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), ''
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    kotlinOptions {
        jvmTarget = '1.8'

realm {
    syncEnabled = true

dependencies {
    implementation 'io.realm:realm-gradle-plugin:10.11.0'
    implementation 'androidx.core:core-ktx:1.7.0'
    implementation 'androidx.appcompat:appcompat:1.4.2'
    implementation ''
    implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
    testImplementation 'junit:junit:4.13.2'
    androidTestImplementation 'androidx.test.ext:junit:1.1.3'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'

Follow the project to perform CRUD operations


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