# KumamonCalc vs RainbowCalc

The clearest difference is rating: KumamonCalc at 5.0 against RainbowCalc's 2.0. KumamonCalc also leads on iOS requirement (13.0 vs 15.1). RainbowCalc's advantage is in-app purchases (none vs 1) and update cadence (fortnightly vs every 3 months). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. KumamonCalc sells 1 one-off in-app purchase. RainbowCalc asks for nothing beyond the download.

KumamonCalc holds the better App Store score, 5.0 against 2.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

KumamonCalc ships an update every 3 months, RainbowCalc fortnightly. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | KumamonCalc | RainbowCalc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/kumamoncalc/id830364492/reviews)** | [2.0 (1 ratings)](https://appshunter.io/ios/app/rainbowcalc/id6479331134/reviews) |
| Number of ratings | **2** | 1 |
| Positive reviews | 80.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 3 months | **Fortnightly** |
| Monetization | Free with in-app purchases | — |
| Size | 50 MB | 34 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [woodsmall inc.](https://appshunter.io/developer/708077492) | [Andre Silva](https://appshunter.io/developer/1719182490) |

## What reviewers say

### KumamonCalc

[App page](https://appshunter.io/ios/app/kumamoncalc/id830364492)

A straightforward calculator featuring the popular Kumamon character. It supports basic arithmetic, percentage calculations, and memory functions. Users can customize themes and toggle sound effects.

**Highlights:** Basic arithmetic operations, Percentage calculation, Memory function, Customizable themes, Sound ON/OFF option, 12-digit input support

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Advertising hide | $4.99 | one-time |


### RainbowCalc

[App page](https://appshunter.io/ios/app/rainbowcalc/id6479331134)

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

**In-app purchases:** none


## Frequently asked questions

### Is KumamonCalc free?

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

### Is RainbowCalc free?

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

### Which has better reviews, KumamonCalc or RainbowCalc?

KumamonCalc is rated higher. KumamonCalc averages 5.0 out of 5 from 2 ratings, while RainbowCalc averages 2.0 from 1 ratings.

### Do KumamonCalc or RainbowCalc have ads?

Both KumamonCalc and RainbowCalc show ads.

### Which is updated more often, KumamonCalc or RainbowCalc?

KumamonCalc ships an update every 3 months, and RainbowCalc fortnightly. Most recently, KumamonCalc was updated on October 23, 2026 and RainbowCalc on October 24, 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.*