# Scale Ruler - Pocket Ruler — Triangular Scale & Ruler

> Triangular Scale & Ruler (iPhone/iPad app by 佳 赵.)

- Source: https://appshunter.io/ios/app/scale-ruler-pocket-ruler/id6802178983 (this page in markdown: same URL + `.md`)
- Developer: [佳 赵](https://appshunter.io/developer/6802149278)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 16.0 · 5 MB
- Languages: American English, French (France), German (Germany), Japanese, Korean, Chinese (Simplified, China), European Spanish, Chinese (Traditional, Taiwan)
- Released: 2026-08-21
- Data updated: 2026-09-23
- User reviews in markdown: https://appshunter.io/ios/app/scale-ruler-pocket-ruler/id6802178983/reviews.md

## What is Scale Ruler?

Scale Ruler brings a realistic triangular scale to your iPhone, designed for drafting, measuring, studying, and everyday reference.
Explore multiple scale standards with a smooth, swipeable ruler interface that recreates the familiar look and feel of a physical triangular scale.
KEY FEATURES
• Realistic Triangular Scale
View all three scale faces and swipe smoothly through detailed graduations.
• Multiple Scale Standards
Choose from commonly used standards for China, Japan, the United States, the United Kingdom, Germany, and more.
• Custom Scale Ratios
Create your own scale setup by adjusting ratios and graduations for individual ruler faces.
• Labels & Markers
Add custom labels and markers directly to the ruler for scale notes, project names, dates, and other references.
• Automatic & Manual Calibration
The app can calibrate based on your device display, with manual fine-tuning available using a physical ruler when greater precision is required.
• Night Mode
Use a darker interface for more comfortable viewing in low-light environments.
Whether you're an architect, designer, engineer, student, model maker, or simply need a convenient scale reference, Scale Ruler puts a versatile triangular scale right on your iPhone.
Some advanced customization features may require an in-app purchase.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Scale Ruler Pro | $1.99 | one-time |



## Version history (last 2 releases)

### 1.1 — 2026-09-08

Fixed the App Store rating link.
Added haptic feedback when switching ruler faces and dragging or placing labels.
Improved overall stability and usability.

### 1.0 — 2026-08-21

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-23.*