Ruler3.6

Use a coin or a credit card to calibrate the ruler anywhere, when you don't have a real ruler with you! Ad free, for real, forever!
Pick your units: fractional inches, decimal inches, centimeters or millimeters
Calibrate your ruler with a credit card to get you started anytime, anywhere
Don't have a credit card with you? Calibrate your ruler with a coin!
Calibrate your ruler with a real ruler to achieve the best precision in your measurement transfers
Manually set the ruler to a known length for accurate measurements
Night mode to save battery (on AMOLED screens) and to relieve your eyes at night
Save your measurements for future use
No permission required Update history: 3.5 Millimeters, set to predefined length
3.3 - Calibrate with a credit card, remove saved measurements from history
3.2 - Fractional display of measurements in inches
3.0 - Android Material theme and new scale for measurements in inches
2.1 - Calibrate with a coin, default calibration button (reset)
2.0 - You can now save your measurements
1.7 - Night mode to save battery and/or read more easily at night
1.6 - Added default calibration for common devices (Nexus series, Galaxy S series, Galaxy Note 1, 2 and 3)