# Calculator + vs RadMonJP

The clearest difference is price: RadMonJP at Free against Calculator +'s $3.99. RadMonJP also leads on update cadence (every 8 days vs every 3 months). Calculator +'s advantage is in-app purchases (none vs 6) and iOS requirement (9.0 vs 26.0). On ads and device support there is nothing between them.

RadMonJP is free to download; Calculator + costs $3.99 up front. RadMonJP sells 6 in-app purchases, starting at $0.99 per month. Calculator + asks for nothing beyond the download.

Calculator + ships an update every 3 months, RadMonJP every 8 days. The most recent releases landed on October 24, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Calculator + | RadMonJP |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | **[4.4 (13 ratings)](https://appshunter.io/ios/app/calculator-plus-twin-plus-app/id1378597024/reviews)** | — |
| Number of ratings | **13** | — |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 8 days** |
| Monetization | Paid | — |
| Size | 27 MB | 10 MB |
| Requires iOS | **9.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Satomi Uchida](https://appshunter.io/developer/1340507560) | [RR Aware Studio](https://appshunter.io/developer/1439301679) |

## What reviewers say

### Calculator +

[App page](https://appshunter.io/ios/app/calculator-plus-twin-plus-app/id1378597024)

This advanced calculator offers multiple calculation modes, a persistent history log, and customizable themes. It functions offline and is compatible with Mac devices, providing a comprehensive tool for various mathematical needs.

**Highlights:** Multiple calculator modes, Calculation history log, Customizable color themes, Global comma formatting, Offline functionality, Mac compatibility

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

**In-app purchases:** none


### RadMonJP

[App page](https://appshunter.io/ios/app/radmonjp/id6737837347)

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| プレミアム1ヶ月 | $0.99 | per month |
| Bronze | $4.99 | per year |
| Silver sponsor | $9.99 | per year |
| Gold sponsor | $19.99 | per year |
| Platinum sponsor | $49.99 | per year |
| Diamond sponsor | $99.99 | per year |


## Frequently asked questions

### Is Calculator + free?

Calculator + costs $3.99, with no in-app purchases.

### Is RadMonJP free?

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

### Do Calculator + or RadMonJP have ads?

Neither Calculator + nor RadMonJP shows ads.

### Which is updated more often, Calculator + or RadMonJP?

Calculator + ships an update every 3 months, and RadMonJP every 8 days. Most recently, Calculator + was updated on October 24, 2026 and RadMonJP on October 27, 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.*