I’m seeing two different definitions for OPR. Google and Fitbit imply that any non-black pixel is on, but WFS implies that shades of grey/colour are taken into account. So, for example, a screen displaying all #404040 would have 100% OPR by the first measure, and 25% OPR by the second measure. I tested an image of my watchface (which has about 14% non-black) in WFS, and WFS said 5% OPR.
Does anyone know what the Play Store actually tests for?
If you didn’t check this blog, I would like to request that you check out this: Optimizing Watch Face Battery Usage by Reducing On-Pixel Ratio | Samsung Developer?
Thanks. I read that but it actually seems internally contradictory! In one place, it says ‘uses more than 15% of the available pixels’: I’d assume that a grey pixel is ‘used’, so would count towards the total. However, it also gives an example where dull text contributes less than white text.
It’s a shame that Play Store guidance isn’t more explicit.
If your watch face uses more than 15% of the available pixels in AOD mode, the Google Play Store may reject your watch face. So be sure your OPR is less than 15%.
In the blog, some tips are shared that may help you to reduce OPR value. One is the color of the text in AOD mode; darker text uses less battery power than white text.