Plusgram - Telegram
FAQ Entry
57

Use a self-destruct timer

In a secret chat, you can set messages to self-destruct after a chosen amount of time once they have been viewed.

This helps reduce the risk of sensitive content remaining on devices for too long.

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If this answer only covers part of your case, continue with related questions from the same topic. That usually makes account, installation, and security issues easier to connect and solve.