# Ruler - Scale Ruler

> Various scales can be set!

Canonical page: [https://chrome-stats.com/d/id919130707](https://chrome-stats.com/d/id919130707)

## Overview

- **ID:** `id919130707`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** mitsunori oishi
- **Category:** Productivity
- **Rating:** 3.70 / 5 (3 ratings)
- **Version:** 4.7
- **Last updated:** 2026-03-19
- **First published:** 2014-10-08
- **Size:** 4.10 MB
- **Data as of:** 2026-09-24
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/ruler-scale-ruler/id919130707)
- **Website:** [https://www.mapp2014.com/](https://www.mapp2014.com/)
- **Privacy policy:** [https://www.mapp2014.com/privacy-scaleruler](https://www.mapp2014.com/privacy-scaleruler)

## 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.

## Rankings

- #599,613 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/id919130707)