For all of the changes in the April update, like read time in topics, creating groups without members, new ways to buy Telegram Premium, plus improved interfaces and new animations – check out our full blog:
https://telegram.org/blog/shareable-folders-custom-wallpapers
April Features
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Telegram
Shareable Chat Folders, Custom Wallpapers and More
This update lets users share entire chat folders with one link, create custom wallpapers for individual chats, use web apps in any chat and more.
For more features from this update, like dynamic order for stickers, improved folder support and over 400 bug fixes, see our latest blog:
https://telegram.org/blog/power-saving
March Features
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Telegram
Power Saving Mode and More
This update brings a new power saving mode, optimizes Telegram for lower-end Android devices, adds even more playback speed options, and much more.
Auto-Send Invite Links. When adding users who restrict invites to groups and channels, a button appears to quickly send an invite link instead.
Read Time in Small Groups. Read receipts in small groups now show at what time each person read the message.