I used rebble for quite a while—super kudos to those folks—but eventually gave it up. The battery life was finally showing signs of loss and my wife had already made the switch to Apple Watch when her Pebble died.
I’m kind of surprised rebble was allowed to continue this long after FitBit bought then killed Pebble. I know they said rebble could exist, but IIRC, there was some hinting it wouldn’t be for too much longer. Glad they either forgot about it or just let it be.
Google bought FitBit and even did an update to the Pebble app last year to make a 64-bit version of the Pebble app so it would work on new devices. Guess they really didn't want Pebble added to the killed by Google list!