I use coinbase all this time indeed in small amounts and I rarely use them
You have said that you use coinbase all the time and then rarely use them? that's confusing and contradicting to what you're saying to justify the usage of Coinbase mobile app.
I still loyal with using exchange wallet crypto than have install mobile wallet, so far I only know with mobile wallet like coinomi and I have installed last week
Coinomi isn't an exchange wallet although it has an integrated exchange through changelly and shapeshift.