# addition calc vs RainbowCalc

The clearest difference is ads: addition calc at none against RainbowCalc's shown. addition calc also leads on iOS requirement (9.3 vs 15.1). RainbowCalc's advantage is update cadence (fortnightly vs monthly). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

addition calc ships an update monthly, RainbowCalc fortnightly. The most recent releases landed on October 11, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | addition calc | RainbowCalc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[2.0 (1 ratings)](https://appshunter.io/ios/app/rainbowcalc/id6479331134/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Fortnightly** |
| Monetization | Free | — |
| Size | 13 MB | 34 MB |
| Requires iOS | **9.3** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Shozo Obayashi](https://appshunter.io/developer/1453986142) | [Andre Silva](https://appshunter.io/developer/1719182490) |

## What reviewers say

### addition calc

[App page](https://appshunter.io/ios/app/addition-calc/id1453986143)

This calculator app clearly displays inputs and sums on separate rows for easy understanding. Perform basic arithmetic operations with large, accessible buttons. Customize decimal places and rounding for precise calculations.

**Highlights:** Separate input and sum display, Large buttons for easy input, Supports four input operations, Customizable decimal places, Adjustable rounding settings, Optional vibration feedback

**Features:** macOS Compatibility

**In-app purchases:** none


### RainbowCalc

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

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

**In-app purchases:** none


## Frequently asked questions

### Is addition calc free?

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

### Is RainbowCalc free?

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

### Do addition calc or RainbowCalc have ads?

RainbowCalc shows ads; addition calc does not.

### Which is updated more often, addition calc or RainbowCalc?

addition calc ships an update monthly, and RainbowCalc fortnightly. Most recently, addition calc was updated on October 11, 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.*