Some people still use Mycelium wallet, others use Blue wallet, but I think Unstoppable.money wallet is worth checking out.
I would personally never keep bitcoin in a multicurrency wallet unless there is some particular reason that forces me to do it. We have several good standalone mobile wallets mentioned in this thread, and I would use multicurrency wallets only for altcoins.
One more option is called atomicdex.io and you can use it to make atomic swaps between various coins.
Have you tried atomicDEX personally, and how did you like it? What's the liquidity like and are there any limitations or hidden fees worth knowing about?
@OP
If you decide to go with atomicDEX, don't get confused after you click on the Google Play or iOS buttons to download the app. It opens a screen asking you to become a tester for an unreleased version of the service. It's actually a bad way they did this. You can't get the official link until you accept to become a product tester, and then on the next screen that pops up, you will see a hyperlink that allows you to download the official and public version of the app.