I looked at my houseplants for inspiration. Flowering orchid and hand-drawn dot-matrix numbers.

Shows coarse battery state when relevant. Designed for minimal battery consumption: screen updates by minute, native code.

A nightly creature.

I ordered a Round 2 and tried building my own watchface while waiting for it. It's minimal, native, and updates the screen once a minute, so hopefully it will eat very little battery.

Shows coarse battery state when relevant.