Telegram's move to Swift on iOS promises a more battery-friendly app:
Founder Pavel Durov said on his Telegram channel that the Swift version looks the same as the current app, but it's sleeker, faster and more battery efficient. He noted that the Telegram team is "putting some finishing touches on it," though it's pretty much ready to make the switch for all of its iOS users. A completely new codebase could mean there are some bugs or glitches, though Durov claims Telegram will quickly fix them.
(Score: 3, Informative) by cubancigar11 on Monday September 24 2018, @04:23AM
Telegram is also quite ahead of the technology curve, as a lot of features in whatsapp first appeared in telegram. Plus telegram is a "platform" so that you can write "bots" on it that automate things.