So I have been using this app for about a month now and I give it a 4.5 out 5 rating.
here is why
It supports most of the crypto currencies under the top 20 on coinmarketcap.com
It is easy to use!
It is safe from what I heard and read!
You can also use it to BUY and exchange for different currencies between your wallets.
Check it out freewallet.org
Ask if you have any questions.
And yes it has a steem wallet if you missed it !