LeTak

Don’t know sorry. I think someone wrote an app for the old pebble time watch back then (2019). Just look in the SailfishOS app stores if there is an app for your watch. You can access them via web browser https://openrepos.net/

I have used sailfishOS back in 2019 on my XA2. I used it without license (demo basically) without knowing it. Was familiar enough with Linux to update and manage apps by myself. But all in all. It was a nice year with that phone. Many problems are fixed by now. I wanted to use it with a pebble back then but I could not get one at that time. I switched later to GrapheneOS and bought a Pixel 3. Why? More Privacy/Security Features. But I miss my handy Linux terminal…. Also leaned a little Qt to Programm or fix simple apps on Sailfish. My XA2 got now a license for SailfishOS and lies in my drawer since I sometimes want to test apps

Jolla Phone and Sony Xperia with Sailfish OS Pixel with GrapheneOS Fairphone with (multiple options) PinePhone (not recommended, old tech)

I also looked into Jolla SailfishOS. I tested it back then with the XA2, now I would go with the Xperia 10 V or VI (when it is supported). Because of better performance. https://docs.sailfishos.org/Support/Supported_Devices/

This was the only reason I liked Android over iOS: the CFW community. I’ve been running some sort of CFW since Android 4.0. Now, the charm has gone. GrapheneOS, SailfishOS, e/OS, LineageOS, iode OS, and even CyanogenMod – I’ve used them all. Each one has its own target group and use case. I hope it turns into the better one again. It’s like forcing a PC to only run the OS it’s delivered with.

I don’t disagree with that. It’s just that most browsers are built that way, unfortunately. Nothing is free, not even Firefox. If you want to sell it, it’s hard to maintain reasonable expectations that people won’t just build it from source instead of buying it. Something 100% free can’t maintain itself over long time.

The UI is as far as I know proprietary

I also asked some creators, but they can’t because of the Google partnership Programm, it prohibits reupload on other platforms

Oh and the i2c etc stuff, I connected ESP32 and other microcontrollers over USB.

I have an old pentium laptop N3520 with 4GB DDR3. I removed everything and put it in a receiver box 1U size. It consumes so little energy that it can run 5-7 hours from its battery (I call it build in USV). Last time I measured 3-7w. Also passiv cooled , no noise. Another machine I use , is with a i7 4770 with 16GB for Proxmox, 7-20w , peak is much higher but rarely used , only on boot and vm startup.