Comparison

Ruler vs American Scale

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

Head to head
About

Ruler

This app displays various measurement scales for length, including meters and inches. It allows users to set magnification ratios and reduced scales for different applications. Users can calibrate the ruler and adjust PPI settings for accurate measurements.

Highlights
  • Display various measurement scales
  • Set magnification ratios
  • Set reduced scales
  • Measure in meters and inches
  • Free mode for custom scales
  • Calibration for accuracy
  • PPI setting
Features
Read full description

Scale Ruler is the simple application to display the scale of various measurement units. ※ Warning: - The accuracy of the scales cannot be guaranteed. - Calibration and PPI values ​​will be reset when the model changes. - Set the PPI value only when the model is undecided. - When you change the PPI value, perform calibration after the change. ■How to use: ■Select mode In UNLOCKED state, after choosing measurement unit, magnification ratio and reduced scale, the scale is displayed. ■Free mode When dragging the screen at UNLOCK, you can set the scale in the range 1: 1 to 1: 100. When you press and hold the scale value, the keyboard is displayed and you can enter the scale. You can lock the scale on the ruler with a switch. Sorry for the advertisement during unlocking. After In-App Purchase, your ads will no longer be displayed. Specification of Scale Ruler - measure length meter,inches - magnification ratio 50% , 70.7% , 100% , 141% , 200% - reduced scale  for meter    1:100 , 1:150 , 1:200 , 1:250 , 1:300 , 1:400 , 1:500 , 1:600  for inch   1:1 , 1:1.5 , 1:2 , 1:2.5 , 1:3 , 1:4 , 1:5 , 1:6  for inch(Architectural)   1:1 , 1:2 , 1:4 , 1:8 , 1:12 , 1:16 , 1:24 , 1:32 , 1:48 , 1:64   1:96 , 1:128 , 1:192 , 1:384  for inch(Engineering) 1:120 , 1:240 , 1:360 , 1:480 , 1:600 , 1:720 1:800 , 1:960 , 1:1080 ■ Settings - Calibration - PPI (pixels per inch) setting - In-app purchase (ads not displayed) - In-app purchase restoration ■ Calibration Adjust the length of the ruler. Use the correct ruler for adjustment. "Calibration" button: Records the adjusted state and reflects the calibration result on the ruler. "Reset" button: Returns the adjustment status to the specified value. It will not be recorded. "Initialize" button: Returns the adjustment status to the specified value and reflects it on the ruler. * Caution: The calibration value will be reset when the model changes. ■ PPI (pixels per inch) setting If the model is undecided, check the PPI value of the model before setting the PPI value. * Please set only when the model is undecided. "OK" button: Record the entered PPI value and reflect it on the ruler display. "Initialize" button: Returns the PPI value to the specified value and reflects it on the ruler. * Caution: The PPI value will be reset when the model changes.

About

American Scale

This application connects to a compatible weigh-in scale to display weight readings remotely. It automatically detects nearby scales, allowing users to select and switch between them. The app supports both pounds and kilograms and includes a feature to zero the scale.

Highlights
  • Remote weight reading
  • Automatic scale recognition
  • Switch between multiple scales
  • Display weight in lbs and Kg
  • Zero scale function
Read full description

American Scale works with our model weigh-in scale and allows you to read the weight remotely. Weight scales around you are automatically recognized, you can choose which scale connect to and easily switch between them. American Scale can show the weight in lbs and in Kg and zero your scale by the means of a button.

Screenshots

Ruler4 screens
American Scale4 screens

Verdict

The call

Ruler and American Scale both sit at 3.7 stars, but that hides the real split: 63% of Ruler's written reviews are positive against 0% of American Scale's. American Scale's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price, rating, ratings volume and update cadence 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. Ruler sells 1 one-off in-app purchase. American Scale asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 3.7 for Ruler against 3.7 for American Scale. Both are backed by a comparable volume of ratings — 3 and 6 respectively. Written reviews are what separate them: 63% of Ruler's written reviews are positive against 0% of American Scale's.

UpkeepUpdate frequency

Ruler ships an update every 5 months, American Scale every 4 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

Scorecard5 real differences · 5 level
Ruler versus American Scale: the parameters behind the verdict, then further details
ParameterRulerAmerican Scale
PriceFreeFree
Rating3.7 (3 ratings)3.7 (6 ratings)
Positive reviews63.0% of reviews — better0.0% of reviews
Number of ratings36 — better
Update frequencyEvery 5 monthsEvery 4 months — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.013.6 — better
Further details — not scored
Size4 MB1 MB
Age rating4+4+
Developermitsunori oishiAmerican Scale CO.

Customer experience

Ruler

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews27 reviews
Positive63.0%
Neutral3.7%
Negative33.3%

American Scale

All ratings6 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

1 purchases

Ruler

One-time1
  • Hide Ads$0.99
None

American Scale

No in-app purchases

Questions

Is Ruler free?
Ruler is free to download, with in-app purchases available.
Is American Scale free?
American Scale is free to download, with no in-app purchases.
Which has better reviews, Ruler or American Scale?
Ruler and American Scale are both rated 3.7 out of 5 on the App Store, from 3 and 6 ratings respectively.
Do Ruler or American Scale have ads?
Ruler shows ads; American Scale does not.
Which is updated more often, Ruler or American Scale?
Ruler ships an update every 5 months, and American Scale every 4 months. Most recently, Ruler was updated on November 1, 2026 and American Scale on November 3, 2026.

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