With this measurement app, you can calibrate a virtual ruler using coins, credit cards, or real rulers to make precise measurements. Includes unit options, measurement saving, night mode, and no permissions required.
AppRecs review analysis
AppRecs rating 4.6. Trustworthiness 71 out of 100. Review manipulation risk 36 out of 100. Based on a review sample analyzed.
★★★★☆
4.6
AppRecs Rating
Ratings breakdown
5 star
84%
4 star
5%
3 star
2%
2 star
1%
1 star
7%
What to know
✓
Credible reviews
71% trustworthiness score from analyzed reviews
✓
High user satisfaction
84% of sampled ratings are 5 stars
About Ruler
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 permissions required
- 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 permissions required
Ruler Screenshots
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Reviews for Ruler
yoyo zhang
2/20/2026
good app
Áine Martin
2/18/2026
Does exactly what it says on the tin, no frills. perfect!!!!
