There are several legitimate Android apps that allow users to earn free bitcoins. One of the most popular apps is Fold, which offers a Spin plan for free. For every $10 spent on a prepaid debit card, users receive a spin on the rewards wheel, usually winning between 5 and 250 Satoshis for each spin. Another popular app is Freecash, which allows users to earn BTC and other cryptocurrencies with a low payout threshold of only 0.25. Cointiply is also a high-paying Bitcoin faucet that gives users free bitcoins every hour and a chance to win up to 100,000 coins in every spin. Additionally, StormGain is an app that allows users to mine cryptocurrency with their phones and rewards them with free Bitcoin in return. Other legitimate apps for earning free bitcoins include Binance, CryptoTab, and Bitcoin Map.