freakified
Phone battery indicator
This is my favourite watchface! It works very well with the Pebble Time UI.
The one thing missing for me is a well to tell the battery status of the connected smartphone (Android). This will save me from having to periodically check my phone (which itself drains the battery). The watch itself has great battery life, so I don't need to know how much power is in it.
I understand that the Pebble app doesn't report phone battery status, so this will require a companion app. Some apps already do this (e.g. Glance and Canvas). I used to use Glance, but I'd prefer a watchface so that I can make full use of the timeline interface.
This can't be done without a companion app, as you say. I personally consider this out of scope for the project, since it would add an enormous amount of complexity for a single data point. That said, though, if someone else contributed such a feature I would consider integrating it.
It turns out this may be doable using the technique from here https://github.com/aHcVolle/TrekVolle/blob/master/src/js/battery.js#L87 More analysis is required to determine which phones/OSs this works on.