Coinbase.
It is a very good, simple, informative, multi-use able, updated cryptocurrency wallet.
1.(Informative - because coinbase tell us many many things about cryptocurrency,it make many tutorial videos and make a chance for users to make some money.)
2.(multiple uses - in here you can buy,sell, transect, receive,tread and watch the information about the rate of currency.)
3.(Updated- coinbase update all the information about the rate of currency in every second and every day )