No written verdict yet. Here is what commenters said.

5recommend
0warn against
Nov 12, 2025first mention
Aug 19, 2026latest mention
Nov 25 – Oct 26
Used forwatch firmwarecustom watch firmwarehackable digital watch firmware

Why people recommend it

“I really like my F91W case with a Sensor Watch Pro board”

“Check out the Sensor Watch project[1]!”

Show 3 more

“Also, no F-91W thread would be complete without a mention of the sensorwatch project: https://www.sensorwatch.net/”

“check out sensorwatch.net or other mods that may exist for the Casio F-91W”

“The astronomy face is superior as it calculates the altitude and azimuth of the selected object”

Caveats and dissent

No one in these comments warned against it.

From the makers not counted in the ranking

“It's an awesome project to hack on. Lots of nice people in the community. Highly recommended.”

All comments 5

“I really like my F91W case with a Sensor Watch Pro board”

“Check out the Sensor Watch project[1]!”

“Also, no F-91W thread would be complete without a mention of the sensorwatch project: https://www.sensorwatch.net/”

“check out sensorwatch.net or other mods that may exist for the Casio F-91W”

“The astronomy face is superior as it calculates the altitude and azimuth of the selected object”

Threads where it came up

Also written as SensorWatch, Sensorwatch. Data: sensor-watch.json. Quotes are verbatim; the verdict and theme labels are written by a model from these comments, and every clause links to its sources.

Keyboard shortcuts
j / kNext / previous item
o or EnterOpen selected item
/Search
g hHome
g tTop
g rRising
g cCategories
tToggle dark mode
?This help