Mobo nitro is a free Android app developed by MAj Plus that uses Telegram's API. It is an unofficial version of Telegram that offers similar features and functionality. The app has a gold theme and is called Mobo nitro موبوگرام طلایی قوی.

The app allows users to send and receive messages, make voice and video calls, create and join groups, and share media files. It also has some additional features like the ability to download media files without compression and the option to customize the interface with different themes and fonts.

Overall, Mobo nitro is a decent alternative to the official Telegram app. However, users should be aware that it is not endorsed or supported by Telegram and may not receive the same level of security updates and maintenance as the official app.