A free program for Android, by Maz dev.

This application is an unofficial messenger of Telegram API. It works without using a filter breaker so you can utilize all of its features.

You can categorize and group your chats based on your preferences. Hide your chats so no one will see them when you leave your phone somewhere. Turn off and on your account to keep your privacy.

Send messages to your friends and family, and make your conversation fun and colorful. Use the drawing feature, send funny animated stickers and emoticons, and apply a theme or skin to your chat background.

You can also delete contacts by group or one by one. This app has a quick forward key in all chats. You can connect to a proxy without needing a filter breaker and VPN.