The app turns on all pixels of one of the RGB colors—red, green, or blue—to check that all display pixels are working properly. You can also turn on white or black to ensure there are no permanently on pixels.
Updated on
Jan 6, 2026
Tools
Data safety
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Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.