You can mine on the phone easily if you set up a JavaScript CryptoNight miner on a webserver. There are a some projects on GitHub that you can use for newer coins like Electroneum, IntenseCoin or Sumokoin for example. Or just use CoinHive.
But you won't get much hashpower though. An iPhone 5 gets you around 3 H/s and a newer iPad around 10 H/s. Plus it is more likely that the permanent heat will damage the phone. So it's possible but not really attractive imho.
But you won't get much hashpower though. An iPhone 5 gets you around 3 H/s and a newer iPad around 10 H/s. Plus it is more likely that the permanent heat will damage the phone. So it's possible but not really attractive imho.