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For maximum privacy, you can create secret chats that use end-to-end encryption. These aren't stored on Telegram's servers, so you can only access them with your specific phone. If one party deletes a message, it disappears on both devices. And you can specify a self-destruct period for all media if you like. Chat Folders Faster and Stronger

There's also a hidden menu that appears when you long-press on the Send button. Choose Schedule message to delay sending until a time in the future. You can also tap Send When Online to send the message when the other person is next active on Telegram. See also: How to delete a Telegram account Customize Theme and Message Corners Lock Your Conversations

Adaptive (Android) or Automatic (iOS): The mode will automatically switch based on the light level around you; you can define the threshold. Under the App Icon section, you should see a handful of pre-defined app icons such as Aqua, Sunset, Mono Black, Classic, Classic Black, Filled, and Filled Black. Now, choose a suitable app icon and you are all set! 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. While all Telegram chats are client-server encrypted, default chats are still stored on Telegram's servers. This conveniently allows you to access your messages on multiple devices, but it might raise privacy concerns.

Premium Telegram Premium Everyone (default one: Allow everyone to view your profile.