No. Coinomi was just caught last week with a newbish mistake. Just google for: coinomi security flaw
A good smartphone wallet is Mycelium.
And yes, especially if you are not great at tech, a hardware wallet can be a savior.
I read about it.
But as I read, it was a desktop only flaw. They sent data to Google or something like that.
Yes mycelium is much better you are right