There are several earning crypto apps available that allow users to earn cryptocurrency through various activities. Here are some popular ones:

1. Coinbase Earn: This app allows users to earn different cryptocurrencies by completing educational tasks and quizzes related to those cryptocurrencies.

2. StormX: StormX is a cashback and rewards app that allows users to earn cryptocurrency by shopping at partner stores, completing micro-tasks, and participating in surveys.

3. Pi Network: Pi Network is a mobile mining app that allows users to mine Pi cryptocurrency using their smartphones. It aims to create a decentralized network of users.

4. Honeyminer: Honeyminer is a mining app that allows users to mine cryptocurrencies like Bitcoin and Ethereum using their computer's processing power. It runs in the background while the computer is idle.

5. Brave Browser: Brave Browser is a privacy-focused web browser that rewards users with its native cryptocurrency called Basic Attention Token (BAT) for viewing ads and supporting content creators.

6. Celsius Network: Celsius Network is a crypto lending and borrowing platform that offers interest on deposited cryptocurrencies. Users can earn interest on their holdings and also borrow against their crypto assets.

7. Binance Earn: Binance Earn is a platform offered by the popular cryptocurrency exchange Binance that allows users to earn passive income by staking or lending their cryptocurrencies.

8. Fold: Fold is a mobile app that allows users to earn Bitcoin rewards by making purchases at partner retailers using their linked debit or credit cards.

It's important to note that investing or earning cryptocurrency involves risks, and users should do thorough research and exercise caution before using any earning crypto app.