# Ruler vs 現調Memo

The clearest difference is in-app purchases: 現調Memo at none against Ruler's 1. 現調Memo also leads on ads (none vs shown) and update cadence (every 9 days vs every 5 months). Ruler's advantage is device support (3 vs 1). On price and iOS requirement there is nothing between them.

Both are free to download. Ruler sells 1 one-off in-app purchase. 現調Memo asks for nothing beyond the download.

Ruler ships an update every 5 months, 現調Memo every 9 days. The most recent releases landed on October 13, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Ruler | 現調Memo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (3 ratings)](https://appshunter.io/ios/app/ruler-scale-ruler/id919130707/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 63.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 5 months | **Every 9 days** |
| Monetization | Free with in-app purchases | — |
| Size | 4 MB | 39 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [mitsunori oishi](https://appshunter.io/developer/905649994) | [NORIHISA KURATA](https://appshunter.io/developer/1896556287) |

## What reviewers say

### Ruler

[App page](https://appshunter.io/ios/app/ruler-scale-ruler/id919130707)

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.

**Highlights:** 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

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Hide Ads | $0.99 | one-time |


### 現調Memo

[App page](https://appshunter.io/ios/app/memo/id6774897614)

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

**In-app purchases:** none


## Frequently asked questions

### Is Ruler free?

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

### Is 現調Memo free?

現調Memo is free to download, with no in-app purchases.

### Do Ruler or 現調Memo have ads?

Ruler shows ads; 現調Memo does not.

### Which is updated more often, Ruler or 現調Memo?

Ruler ships an update every 5 months, and 現調Memo every 9 days. Most recently, Ruler was updated on October 13, 2026 and 現調Memo on October 4, 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.*