Looking for a keymapper to work with my Ps4 controller

I'm looking for a keymapper (no root) that will work with my PS4 controller better than the one I have now.

The one I have now works except sometimes with reason or warning it will make the controls stick to whatever it is that I might be pressing at the time. If I'm not pressing anything all the inputs after it freezes all happen at once and this can be very troublesome when playing games.

I have an LG G4 on lolipop