Just saw this part... Your drummer has gotta step up and do his part. If us bass players spend countless hours on our 1-5's, he can learn how to keep time.
I will say, I've seen the difference the LiveBPM app can make. It is not a metronome, it displays the tempo of the music it hears. In my dad band, the drummer couldn't keep time for nothing, it was very frustrating. I got him a phone mount for a bicycle and he mounted it on a cymbal stand and downloaded the app. He tried it once, liked it, but then refused to use it for a few months. A little nudging and some small suggestions along the way and he started using it again. It made a big difference.
Good luck.