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. Telegram

The platform offers three kinds of polls: 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. Turn on Secret Chat

While you can receive/send files irrespective of their type and size, you can disable automatic media download and auto-play media to save mobile data. This way, you can also avoid downloading unnecessarily large files. This page also lets you select your preferred night mode theme. Large file size limit Set Telegram Pass code in Telegram features

You don’t have to start from scratch to make Telegram apps. TDLib (Telegram Database Library) makes it easy to develop feature-rich and secure apps. It takes care of local data storage, network implementation details, and encryption so that you can focus on design and interfaces. One of the worst parts about messaging apps is that anyone can add you to random groups without your active permission. However, the good part is that Telegram gives you an option to disable it altogether. You can change the desired settings from Settings menu -> Privacy and Security -> Groups -> My Contacts and then select all the Telegram users to “Never Allow”. I can’t tell you how much I love this Telegram trick. 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. Security

Add Multiple Accounts b Telegram Messenger Tricks Improved External Sharing on iOS