# 電卓　水色 vs TextMath

The clearest difference is in-app purchases: 電卓　水色 at none against TextMath's 1. TextMath's advantage is ads (none vs shown) and update cadence (every 5 days vs every 46 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. TextMath sells 1 one-off in-app purchase. 電卓　水色 asks for nothing beyond the download.

電卓　水色 ships an update every 46 months, TextMath every 5 days. The most recent releases landed on October 12, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | 電卓　水色 | TextMath |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 46 months | **Every 5 days** |
| Size | 19 MB | 41 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [kota tada](https://appshunter.io/developer/1658942612) | [MHOST LTD](https://appshunter.io/developer/1805479638) |

## What reviewers say

### 電卓　水色

[App page](https://appshunter.io/ios/app/id1658942610)

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

**In-app purchases:** none


### TextMath

[App page](https://appshunter.io/ios/app/textmath/id6753336547)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Pages | $1.99 | one-time |


## Frequently asked questions

### Is 電卓　水色 free?

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

### Is TextMath free?

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

### Do 電卓　水色 or TextMath have ads?

電卓　水色 shows ads; TextMath does not.

### Which is updated more often, 電卓　水色 or TextMath?

電卓　水色 ships an update every 46 months, and TextMath every 5 days. Most recently, 電卓　水色 was updated on October 12, 2026 and TextMath on October 13, 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.*