Ruler ++ vs Ruler
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Ruler ++
This app allows you to measure lengths accurately in both inches and centimeters. It provides a simple and straightforward tool for quick measurements.
- Measure in inches
- Measure in centimeters
- Accurate length measurement
- Simple interface
Read full descriptionHide full description
Measure length in inches and cm.
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
Read full descriptionHide 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.
Screenshots
Verdict
Ruler ++ and Ruler both sit at 3.5 stars, but that hides the real split: 63% of Ruler's written reviews are positive against 15% of Ruler ++'s. Ruler ++'s advantage is ads (none vs shown) and ratings volume (934 vs 3). On price, rating, update cadence 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
Both are free to download. Ruler ++ sells 1 one-off in-app purchase and Ruler sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Ruler holds the better App Store score, 3.7 against 3.5. That said, the two scores are not equally well evidenced: Ruler ++ has 934 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 15% of Ruler ++'s written reviews are positive against 63% of Ruler's.
Both ship on a similar rhythm, roughly every 5 months. The most recent releases landed on October 17, 2026 and October 13, 2026 respectively.
| Parameter | Ruler ++ | Ruler |
|---|---|---|
| Price | Free | Free |
| Rating | 3.5 (934 ratings) | 3.7 (3 ratings) — better |
| Positive reviews | 14.9% of reviews | 63.0% of reviews — better |
| Number of ratings | 934 — better | 3 |
| Update frequency | Every 5 months | Every 5 months |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 8.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 17 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Fapps World et Cie S.E.C.S. | mitsunori oishi |
Customer experience
Ruler ++
Ruler
Bugs and requests
Ruler ++
Reported bugs
3 issues- Ruler markings are incorrect
- Ruler not displaying full length on screen
- Incompatible with newer iPhone models
Requested features
3 requests- Add ability to calibrate ruler for different devices
- Improve accuracy of measurements
- Reduce or remove ads
Ruler
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Ruler ++
- Advertisement-free upgrade$0.99
Ruler
- Hide Ads$0.99
Questions
Is Ruler ++ free?
Is Ruler free?
Which has better reviews, Ruler ++ or Ruler?
Do Ruler ++ or Ruler have ads?
Which is updated more often, Ruler ++ or Ruler?
Other comparisons
