Comparison

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

Ruler

Measure objects and distances with an on-screen ruler and augmented reality. Supports inches and centimeters, with features for linear sizes, angles, area, volume, and more. Save your measurements for later use.

Highlights
  • On-screen ruler for small objects
  • Augmented Reality (AR) measuring
  • Measure linear sizes in cm/inches
  • Calculate angles, area, and volume
  • Save measurements
  • Generate plan projections
Features
Read full description

Measure everything with a beautiful on-screen ruler.  Choose between inches and centimeters.  Tap the screen to start using the best multi-touch measuring system and find the size of all curious objects around you.  Also with your camera measure everything accurate by using Augmented Reality (AR) feature. 1) Allows to tape measure linear sizes in cm, inches 2) With Bubble meter allows you to level objects horizontal 3) Save measurments 4) Allows to tape measure distance from device camera to a fixed point on the detected 3D plane. 5) Angle – allows to tape measure corners on 3D planes. 6) Area and Perimeter – allows to tape measure perimeter and area of the room. 7) Volume – allows to tape measure size of 3D objects. 8) Path – allows to calculate the length and area of the path. 9) Height – allows to tape measure height relative to the recognized surface. 10) Plan – generates plan projection for drawn objects and exports it . 11) On-screen Ruler app – measure small objects directly on the smartphone’s screen.

About

Ruler

Features
Read full description

Turn your smartphone screen into a precise ruler. Measure real lengths with a simple touch and drag. 【Key Features】 - Touch & drag to measure lengths instantly - Switch between cm and inch units - Real-time measurement display - Automatic PPI detection for accurate results 【Precision Calibration】 - Credit card (85.6mm) calibration for pinpoint accuracy - Saved calibration — set it once, measure anytime - Optimized accuracy per device 【Easy-to-Use Design】 - Clean ruler interface with clear markings - Dark mode support - 10 languages supported - Intuitive unit toggle 【Perfect For】 - Quick measurements when you don't have a ruler - DIY, crafts, and sewing projects - Furniture placement and space planning - Students and professionals on the go No need to carry a ruler — measure anything, anywhere with your phone!

Screenshots

Ruler4 screens
Ruler3 screens

Verdict

The call

The clearest difference is ads: Ruler at none against Ruler's shown. Ruler also leads on update cadence (every 2 months vs every 14 months). On price, in-app purchases, device support and iOS requirement 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Ruler ships an update every 14 months, Ruler every 2 months. The most recent releases landed on October 14, 2026 and October 1, 2026 respectively.

Scorecard2 real differences · 8 level
Ruler versus Ruler: the parameters behind the verdict, then further details
ParameterRulerRuler
PriceFreeFree
Rating4.2 (413 ratings) — better—
Positive reviews16.7% of reviews—
Number of ratings413 — better—
Update frequencyEvery 14 monthsEvery 2 months — better
AdsYesNo — better
In-app purchasesNoNo
MonetizationAd-supported—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.013.0
Further details — not scored
Size6 MB23 MB
Age rating4+4+
DeveloperMatrix Software Co.mintaek lee

Bugs and requests

Ruler

Reported bugs

8 issues
  • App crashes on iPhone 17 and iPad
  • App crashes within 1 minute
  • AR mode not functional
  • Cannot switch to cm
  • Measurements are out of scale
Show 3 more
  • Centimeter measurement is wrong
  • Ruler markings are wrong (10ths instead of 16ths)
  • iPhone 14 Pro Max measured as over 9 inches

Requested features

7 requests
  • Fix crashing issues
  • Enable switching to metric (cm)
  • Improve AR mode usability
  • Add save and print functionality
  • Provide usage instructions
Show 2 more
  • Ensure accurate scaling for all devices
  • Fix ruler marking divisions

Ruler

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Ruler

No in-app purchases

None

Ruler

No in-app purchases

Questions

Is Ruler free?
Ruler is free to download, with no in-app purchases.
Is Ruler free?
Ruler is free to download, with no in-app purchases.
Do Ruler or Ruler have ads?
Ruler shows ads; Ruler does not.
Which is updated more often, Ruler or Ruler?
Ruler ships an update every 14 months, and Ruler every 2 months. Most recently, Ruler was updated on October 14, 2026 and Ruler on October 1, 2026.

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