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

Need to measure something right now and there's no ruler in sight? Your phone already has one. Ruler Toolkit turns your phone into a pocket measuring kit: a card-calibrated on-screen ruler, a protractor, a bubble level, a compass, camera measure and a handful of sensor tools — all in one lightweight, sign-up-free app that gets straight to the point. WHAT YOU GET On-screen ruler — measure in cm, mm or inches, with a 2-point mode and adjustable zero Real card calibration — fit a standard card (credit-card / ISO size) to the outline and correct your screen's true DPI, because every device is different Protractor — measure angles on screen with two arms, complement readout and automatic snapping to common angles Bubble level — surface mode (phone flat) and edge mode (long edge against the piece), with zero and hold Compass — find north with figure-8 calibration; keep the phone away from metal and magnets Camera measure — point at the floor or a wall and measure real-world distances in AR (needs an ARCore-certified device) Metal detector — spot ferrous metal by the change it makes in the magnetic field Light meter — read ambient light in lux, from dark to full sunlight Altimeter — set a zero point and read your relative height gain from barometric pressure Vibrometer — rest the phone on a surface and monitor its vibration Flashlight — instant screen light at a tap Saved measurements — keep lengths, angles and levels with a note ("shelf width"), filter, search and export 5 languages — English, Portuguese, Spanish, French and German CALIBRATE ONCE, TRUST IT AFTER An uncalibrated screen ruler is just a guess: the real size of a centimeter changes from device to device. Card calibration takes seconds — drag the handle until the outline matches a real card, and from then on your on-screen measurements reflect your actual screen. MADE FOR EVERYDAY JOBS Assembling furniture, hanging a picture, checking an angle, leveling a shelf, finding north at the campsite: the small measurements of daily life, solved without digging out the toolbox. AN HONEST NOTE ON SENSORS Some tools rely on hardware your phone may or may not have. The compass and metal detector need a magnetometer, the level and vibrometer use the accelerometer, the altimeter needs a barometer, the light meter needs an ambient-light sensor, and camera measure needs an ARCore-certified device. If a sensor is missing, that tool simply stays out of your way — the ruler, protractor and flashlight work on virtually any phone. SIMPLE AND PRIVATE No sign-up and no account required. Your saved measurements and calibration stay on your device; optional Google backup is there only if you want to restore on a new phone. Erase everything anytime in Settings. Keep a whole toolbox in your pocket — download Ruler Toolkit.

Screenshots

Ruler4 screens
Ruler3 screens

Verdict

The call

The clearest difference is update cadence: Ruler at every 2 weeks against Ruler's every 14 months. Ruler's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 16.4). On price, 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

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 weeks. The most recent releases landed on October 27, 2026 and October 29, 2026 respectively.

Scorecard3 real differences · 7 level
Ruler versus Ruler: the parameters behind the verdict, then further details
ParameterRulerRuler
PriceFreeFree
Rating4.2 (419 ratings) — better—
Positive reviews15.2% of reviews—
Number of ratings419 — better—
Update frequencyEvery 14 monthsEvery 2 weeks — better
AdsYesYes
In-app purchasesNoNo
MonetizationAd-supported—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS13.0 — better16.4
Further details — not scored
Size6 MB87 MB
Age rating4+4+
DeveloperMatrix Software Co.MOODLR DESENVOLVIMENTO DIGITAL LTDA

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?
Both Ruler and Ruler show ads.
Which is updated more often, Ruler or Ruler?
Ruler ships an update every 14 months, and Ruler every 2 weeks. Most recently, Ruler was updated on October 27, 2026 and Ruler on October 29, 2026.

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