The Circle app is well designed and easy to use with a whole host of features enabling easy money transfer and syncing with your traditional bank accounts. Circle fully insures your cryptocurrencies deposits through Lloyds of London underwriters. 

The Circle wallet has the following features. 

Commission-free cryptocurrency investments 
Multiple coins including Bitcoin (BTC), Ethereum (ETH), Litecoin (LTC) and more. 
Instant buys from your bank account 
$1 minimums make it easy to track your performance and learn as you go 
Covering your assets with offline storage, 256-bit encryption, two-step verification 
Screen locking by using TouchID, FaceID or a Fingerprint