Earn Bitcoin - BTC Plus is an Android application developed by SH Group that allows users to earn Bitcoin by answering mathematical questions. The app is available for Android 9.0 and later versions.

The app is easy to use and offers a simple interface. Users can earn Bitcoin by answering a set of mathematical questions. The app also provides users with the option to choose the level of difficulty for the questions. The higher the level of difficulty, the higher the payout.

Users can track their progress and earnings through the app. The app also offers a referral program where users can invite their friends to use the app and earn a commission for every successful referral.

Overall, Earn Bitcoin - BTC Plus is a great app for those looking to earn Bitcoin through mathematical quizzes. It is user-friendly, offers different levels of difficulty and provides users with the ability to track their progress and earnings.