On the face of it, the Telegram 5.0 interface looks just like the previous version, but the developers say that rebuilding the app in Swift has made it "faster, sleeker and more battery-friendly," and has also removed a bunch of persistent bugs.
The speed improvements should be immediately noticeable, particularly when viewing animations in chat threads and syncing messages across multiple devices. At the same time, the new in-app notifications allow users to keep on top of new messages without leaving conversations. From the Telegram blog:
The new expandable in-app notifications will help you focus on whatever you're doing in the app without having to ignore incoming messages. When a notification arrives, pull it down to open the relevant chat. When you’re done with the interruption, simply close it to get right back to what you were doing.Elsewhere, the app now includes streaming support for audio files and improved navigation for busy chats, while the app icon message counter has been tweaked so that it no longer shows the number of unread messages in muted chats, which should make it a lot more informative.
Telegram is a free download for iPhone and iPad from the App Store. [Direct Link]