Im always asked about the wallets to use on mobile. I always tell people about Mycelium wallet for bitcoin (yes I know they scammed people with their token sale and produced nothing but wallet is secure and was out before the incident). Now Jaxx offers a multi solution to have one app control different types of coins. This is great for the other coins. They let you spend your balance to zero.
Now for bitcoin Jaxx doesnt let you do that. So you are always stuck paying high transaction fees (way higher even on economical setting then mycelium) and having to leave a few dollars at all times in the wallet. Unless you know what you are doing then you can export the keys manually and enter them into a new wallet on Mycelium or Electrum wallet and spend them all from there. For most newbies this is a problem and you may have to export several keys and wallets to get all your btc out.
Many people lose alot of money in transactions on Jaxx where they have better options on Mycelium.