You can try MyCelium (for iOS I believe - I've used that before), Or you can use Blockstream Green or Muun Wallet. Additionally, if you are using Android, you also have Electrum and Bitcoin Wallet for Android as options.
I recommend staying away from Green Wallet, it offers a multi-signature wallet hence higher fees and technical knowledge (by creating a 3 out of 2 wallet) so you have full access to your coins.
So for bitcoin the best solution is bluewallet and MyCelium for Android & IOS.