Comparison

Millimeter Pro vs Ruler

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 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
Features
Currently charting
Read full description

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

About

Ruler

This utility app uses augmented reality to measure the length and area of real-world objects using your smartphone's camera. It offers unlimited measurements and an ad-free experience with premium subscriptions.

Highlights
  • Augmented reality measurement
  • Measure length and area
  • High precision with AR Kit
  • Unlimited measurements (premium)
  • Ad-free experience (premium)
  • Subscription options available
Read full description

Ruler is the easiest and most accurate based on augmented reality. The app uses augmented reality technology(AR) to measure the real world object's area and length with your smartphone's camera. We have constantly improved​ this app since AR Kit was released which ensure the highest precision. Premium Services 1. Unlimited length Measurement. 2. Unlimited Area Measurement. 3. No Annoying ads. * Subscription is available like any ruler app. The payments will be charged to your iTunes account at confirmation of your purchase. * Subscription automatically renews for the same price and duration period as the original “one week”/”one month”/ unless auto-renew is turned off at least 24-hours before the end of the current period Our Standard Subscriptions are: 1. A one-week auto-renewal subscription with a 3-day trial period. 2. A one-month auto-renewal subscription with a 3-day trial period. Privacy Policy: https://sites.google.com/view/rulerios/terms-condition/privacy-policy Terms of Use: https://sites.google.com/view/rulerios/terms-condition

Screenshots

Millimeter Pro4 screens
Ruler4 screens

Verdict

The call

The clearest difference is price: Ruler at Free against Millimeter Pro's $3.99. Ruler also leads on iOS requirement (11.0 vs 15.0). Millimeter Pro's advantage is in-app purchases (none vs 2) and ads (none vs shown). On rating, ratings volume, update cadence and device support 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

CostPrice · In-app purchases · Ads · Monetization

Ruler is free to download; Millimeter Pro costs $3.99 up front. Ruler sells 2 in-app purchases, starting at $1.99 per 7 days. Millimeter Pro asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.4 for Millimeter Pro against 4.3 for Ruler. Both are backed by a comparable volume of ratings — 109 and 136 respectively. Written reviews are what separate them: 58% of Millimeter Pro's written reviews are positive against 33% of Ruler's.

UpkeepUpdate frequency

Millimeter Pro ships an update every 4 months, Ruler every 7 months. Both last shipped on October 24, 2026.

Scorecard7 real differences · 4 level
Millimeter Pro versus Ruler: the parameters behind the verdict, then further details
ParameterMillimeter ProRuler
Price$3.99Free — better
Rating4.4 (109 ratings) — better4.3 (136 ratings)
Positive reviews57.9% of reviews — better33.3% of reviews
Number of ratings109136 — better
Update frequencyEvery 4 months — betterEvery 7 months
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
Best chart rank#186 — better—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.011.0 — better
Further details — not scored
Size24 MB32 MB
Age rating4+4+
DeveloperVisTech.Projects LLCMD KHAIRUL ISLAM

Customer experience

Millimeter Pro

All ratings108 ratings
Positive85.2%
Neutral3.7%
Negative11.1%
Written reviews38 reviews
Positive57.9%
Neutral5.3%
Negative36.8%

Ruler

All ratings133 ratings
Positive82.0%
Neutral6.8%
Negative11.3%
Written reviews3 reviews
Positive33.3%
Neutral0.0%
Negative66.7%

In-app purchases

None

Millimeter Pro

No in-app purchases

2 purchases

Ruler

Subscriptions2
  • Ruler Premium Weekly3 Days trial$1.997 Days
  • Ruler Monthly Premium3 Days trial$5.991 Month

Questions

Is Millimeter Pro free?
Millimeter Pro costs $3.99, with no in-app purchases.
Is Ruler free?
Ruler is free to download, with in-app purchases available.
Which has better reviews, Millimeter Pro or Ruler?
Millimeter Pro is rated higher. Millimeter Pro averages 4.4 out of 5 from 109 ratings, while Ruler averages 4.3 from 136 ratings.
Do Millimeter Pro or Ruler have ads?
Ruler shows ads; Millimeter Pro does not.
Which is updated more often, Millimeter Pro or Ruler?
Millimeter Pro ships an update every 4 months, and Ruler every 7 months. Most recently, Millimeter Pro was updated on October 24, 2026 and Ruler on October 24, 2026.

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