I don't think this exists. RIP Pebble. Many years ago people were asking them to open source their hardware and software when they shut down but that didn't happen.
Discussion
You’re right that it doesn’t exist. I’ve been searching for a pebble time replacement since Fitbit bought Pebble and squashed it. The Google acquisition was the icing on the cake. You can still buy a Pebble time, or a HR2, but they never made the pebble time 2 (with heart rate) that would have been the dream device.
I have finally settled on the Garmin Forerunnier 255. Do I trust Garmin’s data handling practices more than Fitbit/Google? Yes. Should I? Probably not. Regardless, Garmins don’t have a reputation for breaking like Fitbits do. Garmin feels much closer to a Pebble in terms of customization and data accessibility. It has a color e-ink screen (this was huge for me) and buttons instead of a touch screen, which means a 7-10 battery life even with an onboard GPS. It allows for some open app development but is not open source. It’s definitely less like a smart watch and more like a tracker with notifications. Ive had it for about 6 months now and it’s the first device I’ve been happy with since pebble.
Check this Derek: https://repebble.com
Google os open sourcing PebbleOS
Yep. I just heard about this today. Pretty exciting. 🫂💜🤙🏻