# 算数電卓 Ext vs PercentTraining

The clearest difference is ads: 算数電卓 Ext at none against PercentTraining's shown. 算数電卓 Ext also leads on iOS requirement (9.3 vs 15.6). PercentTraining's advantage is update cadence (daily vs every 3 weeks). 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.

算数電卓 Ext ships an update every 3 weeks, PercentTraining daily. The most recent releases landed on September 20, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | 算数電卓 Ext | PercentTraining |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Daily** |
| Size | 15 MB | 3 MB |
| Requires iOS | **9.3** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ryo itou](https://appshunter.io/developer/1435019729) | [Katsuhiko Yao](https://appshunter.io/developer/1543188534) |

## What reviewers say

### 算数電卓 Ext

[App page](https://appshunter.io/ios/app/ext/id1508470167)

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

**In-app purchases:** none


### PercentTraining

[App page](https://appshunter.io/ios/app/percenttraining/id6744553926)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 算数電卓 Ext free?

算数電卓 Ext is free to download, with no in-app purchases.

### Is PercentTraining free?

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

### Do 算数電卓 Ext or PercentTraining have ads?

PercentTraining shows ads; 算数電卓 Ext does not.

### Which is updated more often, 算数電卓 Ext or PercentTraining?

算数電卓 Ext ships an update every 3 weeks, and PercentTraining daily. Most recently, 算数電卓 Ext was updated on September 20, 2026 and PercentTraining on September 9, 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.*