I forgot to write what I tried already. Anyway, I already tried rebooting the phone and connecting with the wifi off. I have the problem with my phone trying to pair outside of the app (I went through the support FAQ, so I tried to do everything on that list apart from messing w/ the meter hardware themselves). I tried to input a PIN to pair the meter (0000 and 00000000, I got it paired in my Bluetooth settings, but it didn’t change how the app worked in any way.) I also uninstalled and reinstalled the app.
I’m using a Verizon Droid Turbo 2. One of the other devices tried was also a Droid Turbo 2, except it wasn’t upgraded to marshmallow.