Ruler
Ruler has 4,879,008 installs (+0.2% a month, measured over 59 days), rated 4.5 from 14,672 ratings, #2,059 of 247,519 in Tools.
Description
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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
Is Ruler safe?
StoreTally doesn't rate safety. Here's what the store and our tracking show:
Reviews The reviews Google Play shows first (its most relevant), from the US store, in any language.
From 14,656 ratings.
Growth change in installs
| Per | Growth | Growth % | Actual change | Measured over |
|---|---|---|---|---|
| day | Not enough history yet | |||
| week | +1,675 | +0.0% | +2,054 | 8.6 days |
| month | +9,450 | +0.2% | +18,471 | 58.6 days |
| year | Not enough history yet | |||
How these figures are measured
Change in installs, scaled to each window from the real gap between crawls. A window needs a full period of history before it reports anything.
Tracking since 2026-09-13. History accumulates as changes are observed — check back soon.
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