I Wanted Real-Time Stock Charts on My Garmin Watch. Monkey C Had Other Plans.

A developer built a Garmin Venu 2 Plus watch face that displays live stock and crypto sparklines.

The project ran into major constraints from Monkey C, tiny device memory, and no simulator web requests.

API access had to be routed through a phone proxy, and the charts were rendered by hand.

The work also led to custom line-based fonts and use of tools like PrimitiveFont.

The project highlights how even simple live-data features can become a serious engineering challenge on smartwatches.