定規(Ruler) vs Ruler / Measuring Tape
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
定規(Ruler)
A straightforward measuring tool for iPhones, offering accurate measurements in both millimeters and inches. It's designed for ease of use and provides a cool, functional experience for everyday measuring needs.
- Accurate measurements
- Millimeter display
- Inch display
- Supports all iPhone sizes
- Simple interface
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シンプルな定規、mmとinch表示で全てのサイズのiPhoneで正確に測れます。カッコいいでしょ You can measure correctly in iPhone with the size of everything by simple ruler, mm and inch indication. It would be cool
Ruler / Measuring Tape
Measure objects using your device's screen, augmented reality, or by printing a ruler. Offers three distinct methods for on-demand measurement without physical tools.
- Measure against screen
- Augmented reality measurement
- Printable ruler via AirPrint
- ARKit integration
- No ads or in-app purchases
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Three ways to measure when you don't have a measuring tape or a ruler: 1 – AGAINST YOUR SCREEN Simple and precise for small measurements. 2 – IN AUGMENTED REALITY Place a virtual measuring tape on a vertical or horizontal surface, such as a wall, table or floor. Built with ARKit. 3 – USING AIRPRINT Print a ruler! Accuracy depends on the printer, so check the result against the on-screen ruler. NO ADS / NO IN-APP PURCHASES / NO TRACKING If you enjoy this app, discover "Print to Size" and my other independent apps at clafou.com
Screenshots
Verdict
The clearest difference is rating: 定規(Ruler) at 5.0 against Ruler / Measuring Tape's 4.4. 定規(Ruler) also leads on review sentiment (80% vs 51%). Ruler / Measuring Tape's advantage is ratings volume (219 vs 2) and iOS requirement (13.0 vs 15.6). On price, update cadence, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
定規(Ruler) holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Ruler / Measuring Tape has 219 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 80% of 定規(Ruler)'s written reviews are positive against 51% of Ruler / Measuring Tape's.
定規(Ruler) ships an update every 6 months, Ruler / Measuring Tape every 3 months. The most recent releases landed on June 1, 2026 and September 23, 2026 respectively.
| Parameter | 定規(Ruler) | Ruler / Measuring Tape |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | 4.4 (219 ratings) |
| Positive reviews | 80.0% of reviews — better | 50.7% of reviews |
| Number of ratings | 2 | 219 — better |
| Update frequency | Every 6 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 15.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 3 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Mayumi Kato | Clafou Ltd |
Customer experience
定規(Ruler)
Ruler / Measuring Tape
Bugs and requests
定規(Ruler)
Not enough reviews yet to summarise bugs or requests.
Ruler / Measuring Tape
Reported bugs
26 issues- Cannot accurately measure anything
- Force turns off the flashlight
- Shows totally wrong scale on iPhone 15 Pro Max
- cm and inch are in reverse directions
- Ne s’adapte pas au zoom de l’écran
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- Wouldn’t detect any surface
- Incorrect for iPad 7th Gen
- Doesn’t work as advertised (requires camera access)
- Impossibilité de mesurer des verticales
- Sólo sirve para cosas pequeñas
- Pas fiable, mesures différentes comparées avec un mètre-ruban
- Ne fonctionne pas
- Ne marche pas
- Tardo años, no sirve
- Can’t detect flat surface
- iPhone 6s: marche une fois sur dix
- Keeps analysing repeatedly with no recognition whatsoever
- Funktioniert nicht
- No vale para nada, no funciona y no detecta el suelo ni la mesa
- Todavía no entiendo para que sirve
- The augmented reality doesnt work accurately and the rules wont allow us to touch the screen
- Not working at all
- Ne semble pas fonctionner, passe son temps à analyser
- L'app prends énormément de temps à analyser
- AR läuft nicht, erkennt keine Fläche
- Can’t get it to measure anything
Requested features
9 requests- Option to change ruler pips (16/1, 8/1)
- Scrolling ruler for longer objects
- Button to turn on flashlight
- Compatibility for iPad Air 2
- Tutorial or instructions
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- Numeric measurements near the rule
- Ability to take multiple measurements simultaneously
- Dark mode option
- Advanced analytics dashboard
In-app purchases
定規(Ruler)
No in-app purchases
Ruler / Measuring Tape
No in-app purchases
Questions
Is 定規(Ruler) free?
Is Ruler / Measuring Tape free?
Which has better reviews, 定規(Ruler) or Ruler / Measuring Tape?
Do 定規(Ruler) or Ruler / Measuring Tape have ads?
Which is updated more often, 定規(Ruler) or Ruler / Measuring Tape?
Other comparisons
