If you are either A) bootloader unlocked or B) using a custom ROM via an exploit, your system is freely open to modification by a physical attacker, regardless.

I had never heard of BangleJS before and wow, that thing is awesome!

I’m neither a JS or Android/iOS developer, and this thing makes me want to try making a Fitbit-like fitness tracker and companion app.

I might seriously get one. I’ve been on a privacy/declouding kick lately and have somewhat missed my smart watch. This thing looks like great fun.