Millimeter Pro vs 定規(Ruler)
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Millimeter Pro
This app transforms your device into a versatile measuring tool. It allows for precise measurements of length, area, diameter, and angles using the touchscreen. Easily split objects into equal parts and switch between millimeters and inches for your convenience.
- Touchscreen ruler and tape measure
- Measure length, area, diameter, and angles
- Split objects into equal parts
- Supports millimeters and inches
- Estimate radius
- Thread pitch gauge
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App blog: https://goo.gl/da6LdZ Millimeter Pro is an easy-to-use and helpful measurement tool for iPhone or iPad. It uses a touch screen as a ruler or tape measure to make quick measurements, split objects into equal parts, measure object ratio (W/H), measure area, estimate diameter and angles, and split circular objects into equal parts. Place an object on the screen and simply touch and move rulers to measure it. You can measure in different units: MILLIMETERS or INCHES. Features: - mm and inch units - 2D measurements: vertical and horizontal rulers - area calculation - ratio calculation (W/H) - split linear and circular objects into equal parts - shows the length and angle of each part - disable/enable touch screen (freeze feature) - diameter or radius estimation - angle measure with Protractor / Goniometer mode - Thread pitch gauge for TPI and pitch size measurements Use this app in different areas to measure small objects that fit within your phone or tablet screen: jewelry, rings, stones, gem, beads, screws, bolts, buttons, nuts, knitting needles, knitting patterns, washers, insects, mosaic tile, hooks, frame wrap angle, etc. Enjoy the app and Thank you for your interest and support! VisTech.Projects Team
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
Screenshots
Verdict
The clearest difference is price: 定規(Ruler) at Free against Millimeter Pro's $3.99. 定規(Ruler) also leads on rating (5.0 vs 4.4) and review sentiment (80% vs 58%). Millimeter Pro's advantage is ratings volume (108 vs 2) and chart position (#188 vs unranked). On update cadence, ads, in-app purchases and monetization model 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
定規(Ruler) is free to download; Millimeter Pro costs $3.99 up front. 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: Millimeter Pro has 108 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 58% of Millimeter Pro's written reviews are positive against 80% of 定規(Ruler)'s.
Millimeter Pro ships an update every 4 months, 定規(Ruler) every 6 months. The most recent releases landed on September 18, 2026 and June 1, 2026 respectively.
| Parameter | Millimeter Pro | 定規(Ruler) |
|---|---|---|
| Price | $3.99 | Free — better |
| Rating | 4.4 (108 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 57.9% of reviews | 80.0% of reviews — better |
| Number of ratings | 108 — better | 2 |
| Update frequency | Every 4 months — better | Every 6 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Best chart rank | #188 — better | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 24 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | VisTech.Projects LLC | Mayumi Kato |
Customer experience
Millimeter Pro
定規(Ruler)
In-app purchases
Millimeter Pro
No in-app purchases
定規(Ruler)
No in-app purchases
Questions
Is Millimeter Pro free?
Is 定規(Ruler) free?
Which has better reviews, Millimeter Pro or 定規(Ruler)?
Do Millimeter Pro or 定規(Ruler) have ads?
Which is updated more often, Millimeter Pro or 定規(Ruler)?
Other comparisons
