Mining apps are general easy to use and they make use of cloud mining to minimize battery drain. The profits are generally small but worth it for the little effort required and low cost.
Web browsers that mine in the background or pay in cryptocurrency for viewing ads. Available on desktop/mobile devices and being very similar to Google Chrome, the interface feels familiar. Faster browsing and getting paid for something you already do every day!
You will need to store any cryptocurrency that is withdrawn in a wallet. Some wallets allow you to earn extra crypto currencies via Referrals or Staking cypto to gain interest on your investment.