# ACalcM vs 定規(Ruler)for iPad

The clearest difference is in-app purchases: 定規(Ruler)for iPad at none against ACalcM's 1. 定規(Ruler)for iPad also leads on iOS requirement (14.1 vs 17.4). ACalcM's advantage is review sentiment (91% vs 60%) and update cadence (every 4 days vs every 5 months). On price, ads and device support there is nothing between them.

Both are free to download. ACalcM sells 1 one-off in-app purchase. 定規(Ruler)for iPad asks for nothing beyond the download.

ACalcM ships an update every 4 days, 定規(Ruler)for iPad every 5 months. The most recent releases landed on October 24, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | ACalcM | 定規(Ruler)for iPad |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (26 ratings)](https://appshunter.io/ios/app/acalcm/id605657598/reviews)** | — |
| Number of ratings | **26** | — |
| Positive reviews | **90.9% of reviews** | 60.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | **Every 4 days** | Every 5 months |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 20 MB | 1 MB |
| Requires iOS | 17.4 | **14.1** |
| Devices | **iPhone, iPad** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Asoft.iOS](https://appshunter.io/developer/562152712) | [Mayumi Kato](https://appshunter.io/developer/705832872) |

## What reviewers say

### ACalcM

[App page](https://appshunter.io/ios/app/acalcm/id605657598)

This calculator app enhances standard functionality with an editable list to track numbers and operators. It allows for easy modification of entries, row insertion, and calculation sharing via email. Advanced features include memory functions, rounding options, and design customization.

**Highlights:** Editable calculation list, Memory function, Row insert function, Email calculation results, Rounding function, Design customization

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $3.99 | one-time |


### 定規(Ruler)for iPad

[App page](https://appshunter.io/ios/app/rulerfor-ipad/id1148435850)

This free utility app functions as a precise digital ruler for iPads. It supports both millimeter and inch measurements, making it easy to measure any object directly on your device. Designed for simplicity and a cool user experience.

**Highlights:** Digital ruler functionality, Millimeter measurement, Inch measurement, Supports all iPad sizes, Simple and cool interface

**In-app purchases:** none


## Frequently asked questions

### Is ACalcM free?

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

### Is 定規(Ruler)for iPad free?

定規(Ruler)for iPad is free to download, with no in-app purchases.

### Do ACalcM or 定規(Ruler)for iPad have ads?

Both ACalcM and 定規(Ruler)for iPad show ads.

### Which is updated more often, ACalcM or 定規(Ruler)for iPad?

ACalcM ships an update every 4 days, and 定規(Ruler)for iPad every 5 months. Most recently, ACalcM was updated on October 24, 2026 and 定規(Ruler)for iPad on October 23, 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.*