> ## Documentation Index > Fetch the complete documentation index at: https://docs.quickblox.com/llms.txt > Use this file to discover all available pages before exploring further. # Introduction > Learn about QuickBlox platform features and documentation guidelines. QuickBlox provides you with ready-to-use chat and video calling solutions for your apps. Using documentation you can quickly integrate QuickBlox across multiple platforms and devices. ## Before you begin Register a QuickBlox account by visiting the [signup page](https://admin.quickblox.com/signup). It only takes a few minutes, and you can use this account to build your apps. Click the **Add new app** button and fill in the required information about your company to create a new app. Go to the Overview section on your Dashboard, and copy the **Application ID**, **Authorization Key**, **Authorization Secret**, and **Account Key** from there. ## Platform features Use QuickBlox to add rich chat and video calling features to your apps. Our platform has a modular structure. Here is a list of all QuickBlox modules and their features: ### Users | Feature | Platforms | Description | | ---------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------- | | User management | [iOS](/sdks/ios-authentication#loginemail-and-password) \| [Android](/sdks/android-users) \| [JavaScript](/sdks/js-users) \| [React Native](/sdks/react-native-users) \| [Flutter](/sdks/flutter-users) \| [Server API](https://docs.quickblox.com/reference/users) | Create, update, delete, and list users. | | Standard login | [iOS](/sdks/ios-authentication#loginemail-and-password) \| [Android](/sdks/android-authentication#loginemail-and-password) \| [JavaScript](/sdks/js-authentication#loginemail-and-password) \| [React Native](/sdks/react-native-authentication#log-in-user) \| [Flutter](/sdks/flutter-authentication#log-in-user) \| [Server API](https://docs.quickblox.com/reference/create-session) | Log in with email/username and password. | | Social login | [iOS](/sdks/ios-authentication#social) \| [Android](/sdks/android-authentication#social) \| [JavaScript](/sdks/js-authentication#social) \| [Server API](https://docs.quickblox.com/reference/create-session) | Log in using social network accounts. | | Phone number login | [iOS](/sdks/ios-authentication#phone-number) \| [Android](/sdks/android-authentication#phone-number) \| [JavaScript](/sdks/js-authentication#phone-number) \| [Server API](https://docs.quickblox.com/reference/create-session) | Log in using a phone number. | | Custom identity provider login | [iOS](/sdks/ios-authentication#custom-identity-provider) \| [Android](/sdks/android-authentication#custom-identity-provider) \| [JavaScript](/sdks/js-authentication#custom-identity-provider) \| [Server API](https://docs.quickblox.com/reference/create-session) | Log in with a token generated by the identity provider. | | User tags | [iOS](/sdks/ios-users#update-user) \| [Android](/sdks/android-users#update-user) \| [JavaScript](/sdks/js-users#update-user) \| [React Native](/sdks/react-native-users#update-user) \| [Flutter](/sdks/flutter-users#update-user) \| [Server API](https://docs.quickblox.com/reference/users) | Assign tags to users and then address them separately by tags. | | Existing user database integration | [Custom identity provider](/docs/custom-identity-provider) | Easily integrate your existing user database with QuickBlox. | ### Chat | Feature | Platforms | Description | | -------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------- | | Private chat | [iOS](/sdks/ios-chat-dialogs#dialog-types) \| [Android](/sdks/android-chat-dialogs#dialog-types) \| [JavaScript](/sdks/js-chat-dialogs#dialog-types) \| [React Native](/sdks/react-native-chat-dialogs#dialog-types) \| [Flutter](/sdks/flutter-chat-dialogs#dialog-types) \| [Server API](https://docs.quickblox.com/reference/create-dialog) | Create a one-to-one chat. | | Group chat | [iOS](/sdks/ios-chat-dialogs#dialog-types) \| [Android](/sdks/android-chat-dialogs#dialog-types) \| [JavaScript](/sdks/js-chat-dialogs#dialog-types) \| [React Native](/sdks/react-native-chat-dialogs#dialog-types) \| [Flutter](/sdks/flutter-chat-dialogs#dialog-types) \| [Server API](https://docs.quickblox.com/reference/create-dialog) | Create a group chat between multiple users. | | Public chat | [iOS](/sdks/ios-chat-dialogs#dialog-types) \| [Android](/sdks/android-chat-dialogs#dialog-types) \| [JavaScript](/sdks/js-chat-dialogs#dialog-types) \| [React Native](/sdks/react-native-chat-dialogs#dialog-types) \| [Flutter](/sdks/flutter-chat-dialogs#dialog-types) \| [Server API](https://docs.quickblox.com/reference/create-dialog) | Create a public chat between hundreds of users. Anyone can freely join the public chat. | | Message history | [iOS](/sdks/ios-chat-messaging#retrieve-chat-history) \| [Android](/sdks/android-chat-messaging#retrieve-chat-history) \| [JavaScript](/sdks/js-chat-messaging#retrieve-chat-history) \| [React Native](/sdks/react-native-chat-messaging#retrieve-chat-history) \| [Flutter](/sdks/flutter-chat-messaging#retrieve-message-history) \| [Server API](https://docs.quickblox.com/reference/list-messages) | All users' messages are stored on the server. You can fetch them for a particular dialog. | | Presence | [iOS](/sdks/ios-chat-user-presence) \| [Android](/sdks/android-chat-user-presence) \| [JavaScript](/sdks/js-chat-user-presence) \| [React Native](/sdks/react-native-chat-user-presence) \| [Flutter](/sdks/flutter-chat-user-presence) | Subscribe to user presence updates and check user online status. | | Read receipts | [iOS](/sdks/ios-chat-messaging#mark-message-as-read) \| [Android](/sdks/android-chat-messaging#mark-message-as-read) \| [JavaScript](/sdks/js-chat-messaging#mark-message-as-read) \| [React Native](/sdks/react-native-chat-messaging#mark-message-as-read) \| [Flutter](/sdks/flutter-chat-messaging#mark-message-as-read) | Mark messages as read. Thus, users will know if their messages have been read by other users in the dialog. | | Delivery receipts | [iOS](/sdks/ios-chat-messaging#mark-message-as-delivered) \| [Android](/sdks/android-chat-messaging#mark-message-as-delivered) \| [JavaScript](/sdks/js-chat-messaging#mark-message-as-delivered) \| [React Native](/sdks/react-native-chat-messaging#mark-message-as-delivered) \| [Flutter](/sdks/flutter-chat-messaging#mark-message-as-delivered) | Mark messages as delivered. Thus, users will know if their messages have been successfully delivered to other users in the dialog. | | Typing indicators | [iOS](/sdks/ios-chat-messaging#send-typing-indicators) \| [Android](/sdks/android-chat-messaging#send-typing-indicators) \| [JavaScript](/sdks/js-chat-messaging#send-typing-indicators) \| [React Native](/sdks/react-native-chat-messaging#send-typing-indicators) \| [Flutter](/sdks/flutter-chat-messaging#send-typing-indicators) | Subscribe to typing events to indicate if the other user is typing a message at the moment. | | Attachments | [iOS](/sdks/ios-chat-messaging#send-message-with-attachment) \| [Android](/sdks/android-chat-messaging#send-message-with-attachment) \| [JavaScript](/sdks/js-chat-messaging#send-message-with-attachment) \| [React Native](/sdks/react-native-chat-messaging#send-message-with-attachment) \| [Flutter](/sdks/flutter-chat-messaging#send-message-with-attachment) \| [Server API](https://docs.quickblox.com/reference/create-message) | Send messages with attachment so users can share files during a chat, such as images, audio files, videos, and other file types. | | Extended messaging | [iOS](/sdks/ios-chat-messaging#send-message-with-extra-data) \| [Android](/sdks/android-chat-messaging#send-message-with-extra-data) \| [JavaScript](/sdks/js-chat-messaging#send-message-with-extra-data) \| [React Native](/sdks/react-native-chat-messaging#send-message-with-extra-data) \| [Flutter](/sdks/flutter-chat-messaging#send-message-with-extra-data) \| [Server API](https://docs.quickblox.com/reference/create-message) | Extend a message with additional fields. | | Unread message count | [iOS](/sdks/ios-chat-dialogs#get-number-of-unread-messages) \| [Android](/sdks/android-chat-dialogs#get-number-of-unread-messages) \| [JavaScript](/sdks/js-chat-dialogs#get-number-of-unread-messages) \| [React Native](/sdks/react-native-chat-dialogs#get-number-of-unread-messages) \| [Flutter](/sdks/flutter-chat-dialogs#get-number-of-unread-messages) | Display a number of unread messages in a particular dialog. | | Offline messages | [iOS](/sdks/ios-chat-offline-messaging) \| [Android](/sdks/android-chat-offline-messaging) \| [JavaScript](/sdks/js-chat-offline-messaging) \| [React Native](/sdks/react-native-chat-offline-messaging) \| [Flutter](/sdks/flutter-chat-offline-messaging) | Subscribe to push notifications about new messages when the app is not running. | | Contact list | [iOS](/sdks/ios-chat-offline-messaging) \| [Android](/sdks/android-chat-offline-messaging) \| [JavaScript](/sdks/js-chat-offline-messaging) \| [React Native](/sdks/react-native-chat-offline-messaging) \| [Flutter](/sdks/flutter-chat-offline-messaging) | Add and remove users from your contact list. | | User-to-user block | [iOS](/sdks/ios-chat-privacy-list) \| [Android](/sdks/android-chat-privacy-list) \| [JavaScript](/sdks/js-chat-privacy-list) | Add users to your privacy list to block incoming messages from them. | | Trust and safety | [Trust and safety](/docs/chat-moderation#trust--safety-tns) | Create rules to mask profanity or block messages that contain it. | | User ban | [User ban](/docs/chat-moderation#ban-a-user) | Ban a user so the user can no longer connect to the chat server. | | Chatbot | [Simple bot](https://quickblox.github.io/quickblox-javascript-sdk/samples/chat_bots/simple_bot/) \| [RiveScript bot](https://quickblox.github.io/quickblox-javascript-sdk/samples/chat_bots/rivescript/) | Integrate your chatbot with QuickBlox. | ### Video calling | Feature | Platforms | Description | | ---------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | ---------------------------------------------------------------------------- | | Voice and video | [iOS](/sdks/ios-video-calling) \| [Android](/sdks/android-video-calling) \| [JavaScript](/sdks/js-video-calling) \| [React Native](/sdks/react-native-video-calling) \| [Flutter](/sdks/flutter-video-calling) | Create video sessions that can be video and voice, voice-only or video-only. | | One-to-one calls | [iOS](/sdks/ios-video-calling) \| [Android](/sdks/android-video-calling) \| [JavaScript](/sdks/js-video-calling) \| [React Native](/sdks/react-native-video-calling) \| [Flutter](/sdks/flutter-video-calling) | Create video calls between two users. | | Group calls | [iOS](/sdks/ios-video-calling) \| [Android](/sdks/android-video-calling) \| [JavaScript](/sdks/js-video-calling) \| [React Native](/sdks/react-native-video-calling) \| [Flutter](/sdks/flutter-video-calling) | Create video calls with up to 4 users at a time. | | Screen-sharing | [iOS](/sdks/ios-video-calling-advanced#screen-sharing) \| [Android](/sdks/android-video-calling-advanced#screen-sharing) \| [JavaScript](/sdks/js-video-calling-advanced#screen-sharing) | Share a screen across video session participants. | | Mute/unmute | [iOS](/sdks/ios-video-calling-advanced#mute-audio) \| [Android](/sdks/android-video-calling-advanced#mute-audio) \| [JavaScript](/sdks/js-video-calling-advanced#mute-audio) \| [React Native](/sdks/react-native-video-calling-advanced#mute-audio) \| [Flutter](/sdks/flutter-video-calling-advanced#mute-audio) | Disable own or opponent’s audio/video stream. | | Camera switch | [iOS](/sdks/ios-video-calling-advanced#switch-camera) \| [Android](/sdks/android-video-calling-advanced#switch-camera) \| [JavaScript](/sdks/js-video-calling-advanced#switch-camera) \| [React Native](/sdks/react-native-video-calling-advanced#switch-camera) | Switch between camera input during a call. | | Video mirroring | Supported | Flip the video horizontally during a call. | | Offline calls | Supported | Implement offline calls workflow with QuickBlox push notifications. | ### Video conference | Feature | Platforms | Description | | ---------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------- | | Voice and video | [iOS](/sdks/ios-video-conference) \| [Android](/sdks/android-video-conference) \| [JavaScript](/sdks/js-video-conference) \| [Flutter](/sdks/flutter-video-conference) | Create video conference sessions that can be video and voice, voice-only or video-only. | | Group conference | [iOS](/sdks/ios-video-conference#conference-session) \| [Android](/sdks/android-video-conference#create-session) \| [JavaScript](/sdks/js-video-conference#create-session) \| [Flutter](/sdks/flutter-video-conference#create-session) | Create conference calls between 10-12 users at a time. | | Join/rejoin | [iOS](/sdks/ios-video-conference#join-video-room) \| [Android](/sdks/android-video-conference#join-video-room) \| [JavaScript](/sdks/js-video-conference#join-video-room) \| [Flutter](/sdks/flutter-video-conference#join-video-room) | Join a meeting or continue an earlier meeting with those who were in it. | | Mute/unmute | [iOS](/sdks/ios-video-conference#mute-local-audio) \| [Android](/sdks/android-video-conference#mute-local-audio) \| [JavaScript](/sdks/js-video-conference#mute-remote-audio) \| [Flutter](/sdks/flutter-video-conference#mute-local-audio) | Disable own or opponent’s audio/video stream. | | Camera switch | Supported | Switch video inputs during a call. | | Call recording | Supported | Enable server-side recording which means any conference call can be documented. | | Offline calls | Supported | Implement offline calls workflow with QuickBlox push notifications. | ### Content | Feature | Platforms | Description | | ------------ | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------- | | File storage | [iOS](/sdks/ios-content) \| [Android](/sdks/android-content) \| [JavaScript](/sdks/js-content) \| [React Native](/sdks/react-native-content) \| [Flutter](/sdks/flutter-content) \| [Server API](https://docs.quickblox.com/reference/content) | Upload, download, delete media files such as photos, video, documents, etc. | ### Push notifications | Feature | Platforms | Description | | -------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------- | | Instant notifications | [iOS](/sdks/ios-push-notifications#send-apns--push-notifications) \| [Android](/sdks/android-push-notifications#send-push-notifications) \| [JavaScript](/sdks/js-push-notifications#send-push-notifications) \| [React Native](/sdks/react-native-push-notifications#send-push-notifications) \| [Flutter](/sdks/flutter-push-notifications#send-push-notifications) \| [Server API](https://docs.quickblox.com/reference/create-event) | Send instant push notifications to a user's device. | | Scheduled notifications | [iOS](/sdks/ios-push-notifications#send-apns--push-notifications) \| [Android](/sdks/android-push-notifications#send-push-notifications) \| [JavaScript](/sdks/js-push-notifications#send-push-notifications) \| [React Native](/sdks/react-native-push-notifications#send-push-notifications) \| [Flutter](/sdks/flutter-push-notifications#send-push-notifications) \| [Server API](https://docs.quickblox.com/reference/create-event) | Create push notifications that will be sent at a specific time/date. | | Recurring notifications | [iOS](/sdks/ios-push-notifications#send-apns--push-notifications) \| [Android](/sdks/android-push-notifications#send-push-notifications) \| [JavaScript](/sdks/js-push-notifications#send-push-notifications) \| [React Native](/sdks/react-native-push-notifications#send-push-notifications) \| [Flutter](/sdks/flutter-push-notifications#send-push-notifications) \| [Server API](https://docs.quickblox.com/reference/create-event) | Create push notifications that will be sent repeatedly according to the time interval. | | Notifications by user tags | Supported | Send push notifications to specific user groups defined by tags. | | Subscribe device | [iOS](/sdks/ios-push-notifications#subscribe) \| [Android](/sdks/android-push-notifications#automatic-push-subscription) \| [React Native](/sdks/react-native-push-notifications#subscribe-to-push-notifications) \| [Flutter](/sdks/flutter-push-notifications#create-push-subscription) \| [Server API](https://docs.quickblox.com/reference/create-subscription) | Subscribe/unsubscribe a device to receive push notifications. | ### Custom objects | Feature | Platforms | Description | | ---------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------ | | Data schema | [iOS](/sdks/ios-custom-objects) \| [Android](/sdks/android-custom-objects) \| [JavaScript](/sdks/js-custom-objects) \| [React Native](/sdks/react-native-custom-objects) \| [Flutter](/sdks/flutter-custom-objects) \| [Server API](https://docs.quickblox.com/reference/custom-objects) | Create a flexible data schema so you can store and structure your data exactly how you need to. | | Data management | [iOS](/sdks/ios-custom-objects) \| [Android](/sdks/android-custom-objects) \| [JavaScript](/sdks/js-custom-objects) \| [React Native](/sdks/react-native-custom-objects) \| [Flutter](/sdks/flutter-custom-objects) \| [Server API](https://docs.quickblox.com/reference/custom-objects) | Create, update, delete custom object records. | | Flexible queries | [iOS](/sdks/ios-custom-objects) \| [Android](/sdks/android-custom-objects) \| [JavaScript](/sdks/js-custom-objects) \| [React Native](/sdks/react-native-custom-objects) \| [Flutter](/sdks/flutter-custom-objects) \| [Server API](https://docs.quickblox.com/reference/list-records) | Define specific search criteria based on comparisons to the fields of each record and list the exact data that you need. | | Relations | [iOS](/sdks/ios-custom-objects#relations) \| [Android](/sdks/android-custom-objects#relations) \| [JavaScript](/sdks/js-custom-objects#relations) \| [Server API](https://docs.quickblox.com/reference/relations) | Build one-to-many relations between data schemas. | | Permissions | [iOS](/sdks/ios-custom-objects#permission-schema) \| [Android](/sdks/android-custom-objects#permission-schema) \| [JavaScript](/sdks/js-custom-objects#permission-schema) \| [Server API](https://docs.quickblox.com/reference/permissions) | Add a flexible permissions schema by choosing from five permission levels. Specify users who can access the object and operations allowed on a given object. | ### Address book | Feature | Platforms | Description | | ------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------- | | Contact management | [iOS](/sdks/ios-address-book) \| [Android](/sdks/android-address-book) \| [JavaScript](/sdks/js-address-book) \| [Server API](https://docs.quickblox.com/reference/address-book) | Upload contacts to the server. Keep the contacts up-to-date by updating, deleting or syncing the device contacts with QuickBlox. | | Retrieve registered users | [iOS](/sdks/ios-address-book#retrieve-registered-users) \| [Android](/sdks/android-address-book#retrieve-registered-users) \| [JavaScript](/sdks/js-address-book#retrieve-registered-users) \| [Server API](https://docs.quickblox.com/reference/get-registered-contacts-users) | Retrieve registered QuickBlox users from the address book. | | New contact notifications | [iOS](/sdks/ios-address-book#push-notification-on-new-contact-joined) \| [Android](/sdks/android-address-book#push-notification-on-new-contact-joined) \| [JavaScript](/sdks/js-address-book#push-notification-on-new-contact-joined) | Enable push notifications when a contact from your address book joins the app. | ## Getting around Our documentation is split into two basic sections: 1. **Documentation**. Here you can explore our SDKs in-depth. QuickBlox supports multiple platforms including iOS, Android, JavaScript, React Native, and Flutter. Learn all fundamentals for integrating and configuring our SDKs for each particular platform. 2. **Server API**. Use QuickBlox Server API to establish a server-to-server connection between your application and QuickBlox server and fulfill activities associated with chat. Our API documentation is organized around modules. Each module contains a set of specific API requests and respective endpoints. Find a list of parameters and their descriptions below each request. ## Basic recommendations Here are basic recommendations for navigating our documentation. 1. It’s better to start with our **Key Concepts** page to get an overall understanding of QuickBlox. 2. Take a look at our **Code Samples** page with a collection of ready-to-go apps for the most popular platforms. 3. Move over to the **Quick Start** guide of the platform you want to add the QuickBlox to. Learn how to run the code sample and send your first message from here. 4. Refer to our **Setup** page to learn how to initialize, connect, and configure QuickBlox SDK so it works seamlessly with your app. 5. Check **other pages** to customize QuickBlox further. Following other sections, you will understand how to implement each particular functionality in detail whether it is Chat, Video Calling, Push Notifications, etc.