If your iPhone's sensors aren't working correctly, you may need to calibrate them. Here's how to calibrate an iPhone's brightness and motion sensors.
You can calibrate your Google Maps app to give more accurate directions on iPhone or Android, though your options on iPhone are comparatively limited.
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Calibration Frames Demystified – Improve Any Camera’s Astrophotos!
Demystifying darks, flats, and bias frames for DSLR, CMOS, and CCD users alike—everything you need to know to calibrate like a pro.
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