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Great walkthrough. Purchased the app - I have been curious about the performance of my watch for a while but never got around to measuring it. The app nicely hit a niche.

What would be the challenges in using the camera to identify the time on the watch face?

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It’s a great idea. I had it on the back burner. Wasn’t sure if it was worth the time for a relatively niche app. Now I’m thinking it might be worth doing just so I can write about it!

I also had that idea, and I made a crude proof of concept: https://github.com/iver56/cnn-clock

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