This client and all other 3rd party clients use tdlib, which is Telegram's open source client library to their servers. tdlib's development is notoriously behind compared to the client library used by their 1st party apps (which isn't tdlib). A good chunk of Telegram's modern features (voice chats, voice calling, chat reactions) aren't available on tdlib.
This client and all other 3rd party clients use tdlib, which is Telegram's open source client library to their servers. tdlib's development is notoriously behind compared to the client library used by their 1st party apps (which isn't tdlib). A good chunk of Telegram's modern features (voice chats, voice calling, chat reactions) aren't available on tdlib.