Ruler Professional vs Infinite Ruler
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Ruler Professional
Transform your iOS device into a versatile measuring tool. Accurately measure lengths in both centimeters and inches using on-screen markers. Ideal for quick, on-the-go measurements.
- Device as a ruler
- Metric and imperial units
- Adjustable measurement markers
- Real-time distance display
Read full descriptionHide full description
Turn your iPod Touch, iPhone or iPad into a ruler! You want to measure in centimeters? or inches? We support both the metric and English systems. You want to measure the length of an object? You can move the two red lines in the app and the distance between the two lines will be displayed to you immediately!
Infinite Ruler
Measure objects with precision using a digital ruler that extends beyond your screen. Choose fractional inch or centimeter units and calibrate for accuracy. Ideal for quick measurements when a physical tool isn't available.
- Fractional inch or centimeter measurement
- Adjustable precision (1/8, 1/16, 1/32 inch)
- Extendable ruler beyond screen length
- Customizable zero point
- Live distance markers
- On-device calibration
Read full descriptionHide full description
Infinite Ruler The perfect app for when you've forgotten your tape measurer in the shed and want to know how tall your coffee mug is. Or maybe you need to settle an argument about how big your cat's head is. Measure in centimeters or fractional inches, then keep going beyond the length of one screen. • Choose 1/8, 1/16 or 1/32-inch precision • Move the zero point to start anywhere • Place A and B markers for a live distance • Continue measuring across as many ruler pages as you need • Put the scale on the left or right edge • Calibrate per phone for better real-world accuracy Your measurements and calibration values stay on your device.
Screenshots
Verdict
The clearest difference is review sentiment: Infinite Ruler at 100% against Ruler Professional's 57%. Infinite Ruler also leads on rating (5.0 vs 3.3) and in-app purchases (none vs 1). Ruler Professional's advantage is device support (3 vs 1) and iOS requirement (10.0 vs 18.2). On price, ratings volume, update cadence and ads there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Ruler Professional sells 1 one-off in-app purchase. Infinite Ruler asks for nothing beyond the download.
Infinite Ruler holds the better App Store score, 5.0 against 3.3. Both are backed by a comparable volume of ratings — 3 and 2 respectively. Written reviews point the same way: 57% of Ruler Professional's written reviews are positive against 100% of Infinite Ruler's.
Ruler Professional ships an update every 6 months, Infinite Ruler every 7 months. The most recent releases landed on October 29, 2026 and October 8, 2026 respectively.
| Parameter | Ruler Professional | Infinite Ruler |
|---|---|---|
| Price | Free | Free |
| Rating | 3.3 (3 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 57.1% of reviews | 100.0% of reviews — better |
| Number of ratings | 3 — better | 2 |
| Update frequency | Every 6 months — better | Every 7 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 10.0 — better | 18.2 |
| Further details — not scored | ||
| Size | 7 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | KBIC International Ltd | Eric Savoie |
Customer experience
Ruler Professional
Infinite Ruler
In-app purchases
Ruler Professional
- Ad Removal$0.99
Infinite Ruler
No in-app purchases
Questions
Is Ruler Professional free?
Is Infinite Ruler free?
Which has better reviews, Ruler Professional or Infinite Ruler?
Do Ruler Professional or Infinite Ruler have ads?
Which is updated more often, Ruler Professional or Infinite Ruler?
Other comparisons
