# 元号変換 vs sci.calculator

The clearest difference is in-app purchases: 元号変換 at none against sci.calculator's 1. 元号変換 also leads on iOS requirement (12.0 vs 15.0). sci.calculator's advantage is update cadence (every 5 weeks vs every 9 months). On price, ads and device support there is nothing between them.

Both are free to download. sci.calculator sells 1 one-off in-app purchase. 元号変換 asks for nothing beyond the download.

元号変換 ships an update every 9 months, sci.calculator every 5 weeks. The most recent releases landed on October 23, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | 元号変換 | sci.calculator |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 5 weeks** |
| Size | 8 MB | 49 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Seiji Nagano](https://appshunter.io/developer/689628441) | [Yukihiro Shioya](https://appshunter.io/developer/1565306192) |

## What reviewers say

### 元号変換

[App page](https://appshunter.io/ios/app/id736769268)

**Features:** macOS Compatibility

**In-app purchases:** none


### sci.calculator

[App page](https://appshunter.io/ios/app/scicalculator/id1620728508)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| remove Ads | $1.99 | one-time |


## Frequently asked questions

### Is 元号変換 free?

元号変換 is free to download, with no in-app purchases.

### Is sci.calculator free?

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

### Do 元号変換 or sci.calculator have ads?

Neither 元号変換 nor sci.calculator shows ads.

### Which is updated more often, 元号変換 or sci.calculator?

元号変換 ships an update every 9 months, and sci.calculator every 5 weeks. Most recently, 元号変換 was updated on October 23, 2026 and sci.calculator on October 27, 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.*