Bestgram is an UNOFFICIAL messaging app that uses Telegram's API.
Bestgram has all the Telegram’s features plus so many exciting ones which you can see some of them in the list down below.

• Tabs: Keep your main page tidy and organize your chats based on their type.
• Multi Forward: Save your time by editing and sending messages to your friends at the same time.
• Secret Chat: Program your secret chat to self-destruct automatically. Secret Chats use end-to-end encryption to ensure that a message can only be read by its intended recipient.
• Cloud Based: Send media and files, without any limits on their type and size. Your entire chat history will require no disk space on your device.
• Hidden Chats: Remove your private chats from main page and hide them where only you can access.
• Versatile: Create group chats for up to 200,000 members, share large videos, documents of any type (.DOC, .MP3, .ZIP, etc.), and even set up bots for specific tasks.
•Contacts Changes: Be the first one to find out about your friends’ profile changes.
• Fonts & Themes: Change the app appearance in the way you like the most.