# Simple Total Calculator vs RotON

The clearest difference is in-app purchases: Simple Total Calculator at none against RotON's 1. Simple Total Calculator also leads on iOS requirement (15.8.3 vs 17.6). RotON's advantage is ads (none vs shown) and update cadence (every 5 days vs fortnightly). On price and device support there is nothing between them.

Both are free to download. RotON sells 1 one-off in-app purchase. Simple Total Calculator asks for nothing beyond the download.

Simple Total Calculator ships an update fortnightly, RotON every 5 days. The most recent releases landed on October 11, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Simple Total Calculator | RotON |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Fortnightly | **Every 5 days** |
| Size | 36 MB | 8 MB |
| Requires iOS | **15.8.3** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) | [MUNEATSU G.K.](https://appshunter.io/developer/1534902759) |

## What reviewers say

### Simple Total Calculator

[App page](https://appshunter.io/ios/app/simple-total-calculator/id6739667943)

**Features:** macOS Compatibility

**In-app purchases:** none


### RotON

[App page](https://appshunter.io/ios/app/roton/id6754537065)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 拡張機能（プレミアム） | $1.99 | one-time |


## Frequently asked questions

### Is Simple Total Calculator free?

Simple Total Calculator is free to download, with no in-app purchases.

### Is RotON free?

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

### Do Simple Total Calculator or RotON have ads?

Simple Total Calculator shows ads; RotON does not.

### Which is updated more often, Simple Total Calculator or RotON?

Simple Total Calculator ships an update fortnightly, and RotON every 5 days. Most recently, Simple Total Calculator was updated on October 11, 2026 and RotON on October 25, 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.*