With this measurement app, you can calibrate a virtual ruler using coins, credit cards, or real rulers and save measurements for later reference. Includes ad-free experience, multiple units, manual calibration, and night mode features.
AppRecs review analysis
AppRecs rating 4.5. Trustworthiness 66 out of 100. Review manipulation risk 30 out of 100. Based on a review sample analyzed.
★★★★☆
4.5
AppRecs Rating
Ratings breakdown
5 star
98%
4 star
2%
3 star
0%
2 star
0%
1 star
0%
What to know
✓
Low review manipulation risk
30% review manipulation risk
✓
High user satisfaction
98% of sampled ratings are 5 stars
⚠
Low-content positive reviews
Many 5-star reviews use very limited vocabulary
About Ruler+ (Donation)
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
Ruler+ (Donation) Screenshots
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Reviews for Ruler+ (Donation)
Robin Foster
1/15/2026
Does what is says it will do, and without adds. Easily worth the tiny amount requested (not even forced) to pay. Add a protractor for the full 5 stars.
Shannon Woods
12/24/2025
I originally downloaded the free version, but this developer is really awesome so I got the paid version too to support them. Seriously, you guys rock -- just a simple, accurate ruler, no ads, no tracking, just the thing I actually wanted. <3
