Comparison

100cm Ruler vs Ruler

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

Head to head
About

100cm Ruler

This app provides a digital ruler for measuring the length and diameter of small objects directly on your device. It features a millimeter scale and allows for easy sliding to measure.

Highlights
  • Digital ruler functionality
  • Millimeter scale
  • Diameter measurement
  • Screen sliding for measurement
  • Ad removal option
Features
Read full description

Plotting scale is useful to measure the length of small articles and insects. Squared in millimeters on the lower left, thus the diameter can be measured roughly. Hold the screen and slide your iPhone to the right. https://www.youtube.com/watch?v=kxU9xi88IiY Ads can be removed on "Info page".

About

Ruler

Transform your phone into a precise measuring tool. Accurately measure objects, surfaces, and distances using your screen or camera. Ideal for home, work, or on-the-go tasks, providing quick and reliable measurements.

Highlights
  • Measure objects on screen
  • Switch between units (cm, mm, inches)
  • Save and share measurements
  • Easy-to-use interface
  • Accurate and fast measurements
Features
Read full description

Turn your phone into a powerful measuring device with our app. Measure objects, surfaces, and distances precisely using your screen or camera. Whether you’re at home, at work, or on the go — our product gives you accurate measurements in seconds. Main Features: • Measure objects directly on your screen • Switch between units (cm, mm, inches) • Save and share your measurements • Sleek and easy-to-use interface Why You’ll Love It: • Always have a ruler in your pocket • Ideal for DIY, design, school, or daily use • Accurate, fast, and convenient Subscription Details: • Weekly Plan: $4.99/week • Yearly Plan: $19.99/year with a 3-day free trial Payment will be charged to your iTunes Account at confirmation of purchase. Subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours before the subscription ends. Manage or cancel your subscription anytime in your iTunes Account settings. Any unused portion of a free trial will be forfeited when a subscription is purchased. Privacy Policy: https://www.icloud.com/pages/06esymWNjEpTQKyTyk7xrSiLQ#Blank Terms of Use: https://www.icloud.com/pages/0b4ufgCLIPuBpn14hhoiELQOA#Blank_3

Screenshots

100cm Ruler3 screens
Ruler4 screens

Verdict

The call

The clearest difference is rating: Ruler at 5.0 against 100cm Ruler's 4.0. Ruler also leads on update cadence (every 2 days vs every 3 months) and ratings volume (5 vs 1). 100cm Ruler's advantage is monetization model (free with in-app purchases vs subscription) and iOS requirement (12.0 vs 16.0). On price, ads, in-app purchases 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

Both are free to download. 100cm Ruler sells 1 one-off in-app purchase and Ruler sells 7 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Ruler holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: Ruler has 5 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

100cm Ruler ships an update every 3 months, Ruler every 2 days. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.

Scorecard5 real differences · 5 level
100cm Ruler versus Ruler: the parameters behind the verdict, then further details
Parameter100cm RulerRuler
PriceFreeFree
Rating4.0 (1 ratings)5.0 (5 ratings) — better
Positive reviews45.1% of reviews—
Number of ratings15 — better
Update frequencyEvery 3 monthsEvery 2 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases — betterSubscription
DevicesiPhone, iPod — betteriPhone
Requires iOS12.0 — better16.0
Further details — not scored
Size62 MB27 MB
Age rating4+4+
DeveloperZOOMO Inc.Myroslav Drozd

In-app purchases

1 purchases

100cm Ruler

One-time1
  • Remove ADS$1.99
7 purchases

Ruler

Subscriptions7
  • Smart Ruler3 Days trial$2.997 Days
  • Smart Ruler3 Days trial$4.997 Days
  • Smart Ruler3 Days trial$6.997 Days
Show 4 more
  • Smart Ruler$9.991 Year
  • Smart Ruler$14.991 Year
  • Smart Ruler$19.991 Year
  • Smart Ruler$24.991 Year

Questions

Is 100cm Ruler free?
100cm Ruler is free to download, with in-app purchases available.
Is Ruler free?
Ruler is free to download, with in-app purchases available.
Which has better reviews, 100cm Ruler or Ruler?
Ruler is rated higher. 100cm Ruler averages 4.0 out of 5 from 1 ratings, while Ruler averages 5.0 from 5 ratings.
Do 100cm Ruler or Ruler have ads?
Neither 100cm Ruler nor Ruler shows ads.
Which is updated more often, 100cm Ruler or Ruler?
100cm Ruler ships an update every 3 months, and Ruler every 2 days. Most recently, 100cm Ruler was updated on November 1, 2026 and Ruler on October 30, 2026.

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