This Blue is a modern digital version of the historical Cyanometer instrument that was used to measure the blueness of the sky. Our app helps you measure and track sky color variations using your iPhone's camera.
Point your phone camera at the sky, the algorithm will match the sky with the correct blue using the on-screen colour wheel
2. Tap the 'capture' button to save a picture of the sky, plus the shade of blue and location
Tap the 'saved' button to see all the blues you have saved and compare the different shades of blue
Tap on any shade of blue, then tap 'send' to send a beautiful customised card to friends
✷ CAMERA ACCESS ✷
If the camera isn't working, check your privacy settings:
Go to Settings > Privacy > Camera
Ensure Cyanometer is enabled
✷ LOCATION SERVICES ✷
For location tagging:
Go to Settings > Privacy > Location Services
Enable location access for Cyanometer
✷ BEST PRACTICES ✷
Take measurements in clear sky conditions
Avoid cloudy or overcast days
Keep your camera lens clean
Hold your device steady and level
If you have further questions, please contact us at benjaminstrak@gmail.com
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