Yes, there are apps that offer rewards in the form of cryptocurrency. Some popular examples include:
1-Storm Play: An app that allows users to earn cryptocurrency by completing small tasks, such as watching videos and taking surveys. The app rewards users in the form of Storm tokens, which can be exchanged for other cryptocurrencies or used to purchase items in the app's store.
2-Bitcoin Rewards: An app that pays users in Bitcoin for completing small tasks, such as watching videos, taking surveys, and playing games.
3-Crypto Earn: Some crypto exchange platforms like Coinbase and Binance offers crypto earning options where user can stake their crypto assets and earn interest.
4-Lolli: An app that rewards users with Bitcoin when they shop at participating retailers.
5-Brave Browser: A browser that rewards users with the cryptocurrency BAT for viewing ads and using the browser.
These apps and rewards program may have certain terms and conditions and the reward may vary based on the region and time. It's always a good idea to do your own research and read the terms before signing up