# 年号電卓Plus vs ハノイタイマー

The clearest difference is ads: 年号電卓Plus at none against ハノイタイマー's shown. ハノイタイマー's advantage is update cadence (every 5 days vs every 6 weeks) and iOS requirement (15.0 vs 17.6). 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.

年号電卓Plus ships an update every 6 weeks, ハノイタイマー every 5 days. The most recent releases landed on October 12, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | 年号電卓Plus | ハノイタイマー |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 37.5% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 6 weeks | **Every 5 days** |
| Monetization | Free | — |
| Size | 7 MB | 5 MB |
| Requires iOS | 17.6 | **15.0** |
| Devices | iPhone, Apple Watch | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nakanishi Toshihiko](https://appshunter.io/developer/712843914) | [Yutaka Kamoto](https://appshunter.io/developer/1459379625) |

## 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


### ハノイタイマー

[App page](https://appshunter.io/ios/app/id1672517026)

**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 ハノイタイマー free?

ハノイタイマー is free to download, with no in-app purchases.

### Do 年号電卓Plus or ハノイタイマー have ads?

ハノイタイマー shows ads; 年号電卓Plus does not.

### Which is updated more often, 年号電卓Plus or ハノイタイマー?

年号電卓Plus ships an update every 6 weeks, and ハノイタイマー every 5 days. Most recently, 年号電卓Plus was updated on October 12, 2026 and ハノイタイマー on October 7, 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.*