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To lock a chat go to Settings->Privacy and Security->Passcode Lock and enable it. Once you create a passcode and enable it, you will be able to lock and unlock your chats by tapping on the lock icon at the top right of the app. The Bot API is a free and open platform, available to everyone. If you're looking to build your own bot, check out this page. In Telegram, you can adjust the color and background. If you like, you can even set up your own custom theme to make Telegram look exactly the way you like.

Another great option in groups or channels is being able to pin messages. Tap a message and choose Pin to keep it at the top of the chat, where everyone can easily reference it. Another security feature that adds usability is usernames. Instead of giving people your phone number, you can simply give them your username. This gives you better control over what information is out there, and how people can contact you in the future. Telegram’s core functionality is the same as most other messaging apps: You can message other Telegram users, create group conversations, call contacts, make video calls, and send files and stickers. However, there are a few specific features that make it work differently from other chat apps. Telegram’s main feature list may cross over with other apps, but there are many specific differences between it and its competitors. Here is a short list some of the major features that may push you to switch messaging apps.

Disclosure: Our website is reader-supported. If you purchase any service through our partner links, we may earn a commission at no extra cost to you. Premium 4 GB Uploads A further privacy blunder is that Telegram notifies your contacts when you join it — unless you don’t give it permission to access your contacts. The app doesn’t warn you it’s about to ping your contacts, and that’s a big caveat for those who want to use Telegram to keep a low profile. Adaptive (Android) or Automatic (iOS): The mode will automatically switch based on the light level around you; you can define the threshold.

Large file size limit Unlike mass-market messengers like WhatsApp and Line, Telegram is an open-source app. This means anyone can check the app’s source code, protocol, API, and see how it works and make an informed decision.