Challegram (org.thunderdog.challegram) on Google Play
Challegram is an unofficial Telegram client built by third-party developers not related to Telegram Team.How Challegram is different than official Telegram client?It uses a native Telegram Database Library which significantly increases the speed of both data transport and encryption. Unfortunately, TDLib does support only basic Telegram features yet, but we will support them as soon as they will appear in the library.TDLib was released recently to all developers that use Telegram platform. Read more: https://core.telegram.org/tdlibTelegram is a messaging app with a focus on speed and security. It’s super-fast, simple, secure and free.