# 年号電卓Plus vs 年齢･干支計算機

The clearest difference is ads: 年号電卓Plus at none against 年齢･干支計算機's shown. 年齢･干支計算機's advantage is iOS requirement (13.0 vs 17.6). On price, update cadence, 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.

年号電卓Plus ships an update every 6 weeks, 年齢･干支計算機 every 2 months. The most recent releases landed on July 27, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | 年号電卓Plus | 年齢･干支計算機 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 37.5% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 6 weeks** | Every 2 months |
| Monetization | Free | — |
| Size | 7 MB | 7 MB |
| Requires iOS | 17.6 | **13.0** |
| Devices | iPhone, Apple Watch | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Nakanishi Toshihiko](https://appshunter.io/developer/712843914) | [Takao Ichimura](https://appshunter.io/developer/1474061593) |

## What reviewers say

### 年号電卓Plus

[App page](https://appshunter.io/ios/app/plus/id1320583340)

Easily convert between Western and Japanese eras, and determine birth years from age. Explore historical context with explanations for era changes and significant events of each year.

**Highlights:** Western to Japanese era conversion, Japanese era to Western conversion, Calculate birth year from age, View era start and end dates, Understand reasons for era changes, Discover major events of each year

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


### 年齢･干支計算機

[App page](https://appshunter.io/ios/app/id6464290003)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 年号電卓Plus free?

年号電卓Plus is free to download, with no in-app purchases.

### Is 年齢･干支計算機 free?

年齢･干支計算機 is free to download, with no in-app purchases.

### Do 年号電卓Plus or 年齢･干支計算機 have ads?

年齢･干支計算機 shows ads; 年号電卓Plus does not.

### Which is updated more often, 年号電卓Plus or 年齢･干支計算機?

年号電卓Plus ships an update every 6 weeks, and 年齢･干支計算機 every 2 months. Most recently, 年号電卓Plus was updated on July 27, 2026 and 年齢･干支計算機 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.*