Active Call UI Should Show State Without Competing with the Conversation
During a call, the screen is for confirmation and control feedback rather than continuous content.
UI
Volume Feedback Can Be a Small Partial-Refresh Overlay
A physical button needs visible confirmation without forcing a page transition.
Battery and Signal Indicators Need Honest Granularity
Tiny icons can imply precision the underlying measurements do not actually support.
A 168 by 384 E-Paper Screen Changes the UI Grammar
Portrait monochrome e-paper rewards stable hierarchy and punishes unnecessary redraws.
E-Paper UI Design Forced Me to Treat Refreshes as a Resource
A slow monochrome display changes interaction design: information hierarchy matters more than animation.
A Green Badge Needs an Expiration Time
Operational evidence should age out automatically rather than remaining green until someone notices it is old.
The Rotary Encoder Makes Lists Work Without a Touchscreen
Infinite scroll plus push maps naturally to small menu selection when the display is not interactive.