# Screen Ruler vs 台形の完全計算アプリ

The clearest difference is price: Screen Ruler at Free against 台形の完全計算アプリ's $2.99. 台形の完全計算アプリ's advantage is in-app purchases (none vs 2) and ads (none vs shown). On device support there is nothing between them.

Screen Ruler is free to download; 台形の完全計算アプリ costs $2.99 up front. Screen Ruler sells 2 one-off in-app purchases. 台形の完全計算アプリ asks for nothing beyond the download.

Screen Ruler ships an update every 3 months, 台形の完全計算アプリ daily. The most recent releases landed on November 11, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | Screen Ruler | 台形の完全計算アプリ |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | **[3.7 (27 ratings)](https://appshunter.io/ios/app/screen-ruler-measure-length/id1174757735/reviews)** | — |
| Number of ratings | **27** | — |
| Positive reviews | 53.1% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Daily** |
| Monetization | Free with in-app purchases | — |
| Size | 18 MB | 19 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | +4 | 4+ |
| Developer | [向阳 杨](https://appshunter.io/developer/1174757734) | [kotobaz](https://appshunter.io/developer/1634727152) |

## What reviewers say

### Screen Ruler

[App page](https://appshunter.io/ios/app/screen-ruler-measure-length/id1174757735)

Transform your iPhone or iPad into a digital ruler. Measure small objects directly on your screen using centimeters or inches, with magnifier assistance and haptic feedback for precise alignment. Calibrate the ruler for accurate results.

**Highlights:** Calibratable digital ruler, Centimeter and inch scales, Magnifier for precise alignment, Haptic feedback, Measure small objects on screen

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ads-free experience | $1.99 | one-time |
| Support for a cup of coffee | $2.99 | one-time |


### 台形の完全計算アプリ

[App page](https://appshunter.io/ios/app/trapezoider/id6767874919)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Screen Ruler free?

Screen Ruler is free to download, with in-app purchases available.

### Is 台形の完全計算アプリ free?

台形の完全計算アプリ costs $2.99, with no in-app purchases.

### Do Screen Ruler or 台形の完全計算アプリ have ads?

Screen Ruler shows ads; 台形の完全計算アプリ does not.

### Which is updated more often, Screen Ruler or 台形の完全計算アプリ?

Screen Ruler ships an update every 3 months, and 台形の完全計算アプリ daily. Most recently, Screen Ruler was updated on November 11, 2026 and 台形の完全計算アプリ on November 9, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*