Ruler vs American Scale
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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.
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.
- Remote weight reading
- Automatic scale recognition
- Switch between multiple scales
- Display weight in lbs and Kg
- Zero scale function
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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
Verdict
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
Both are free to download. Ruler sells 1 one-off in-app purchase. American Scale asks for nothing beyond the download.
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.
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.
| Parameter | Ruler | American Scale |
|---|---|---|
| Price | Free | Free |
| Rating | 3.7 (3 ratings) | 3.7 (6 ratings) |
| Positive reviews | 63.0% of reviews — better | 0.0% of reviews |
| Number of ratings | 3 | 6 — better |
| Update frequency | Every 5 months | Every 4 months — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.0 | 13.6 — better |
| Further details — not scored | ||
| Size | 4 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | mitsunori oishi | American Scale CO. |
Customer experience
Ruler
American Scale
In-app purchases
Ruler
- Hide Ads$0.99
American Scale
No in-app purchases
Questions
Is Ruler free?
Is American Scale free?
Which has better reviews, Ruler or American Scale?
Do Ruler or American Scale have ads?
Which is updated more often, Ruler or American Scale?
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