# 年号電卓Plus vs ファイルサイズチェッカー

The clearest difference is review sentiment: ファイルサイズチェッカー at 75% against 年号電卓Plus's 38%. ファイルサイズチェッカー also leads on iOS requirement (12.0 vs 17.6). 年号電卓Plus's advantage is ads (none vs shown) and update cadence (every 6 weeks vs every 9 months). 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, ファイルサイズチェッカー every 9 months. The most recent releases landed on October 12, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | 年号電卓Plus | ファイルサイズチェッカー |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/id1358614632/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 37.5% of reviews | **75.0% of reviews** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 6 weeks** | Every 9 months |
| Monetization | Free | — |
| Size | 7 MB | 16 MB |
| Requires iOS | 17.6 | **12.0** |
| Devices | iPhone, Apple Watch | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Nakanishi Toshihiko](https://appshunter.io/developer/712843914) | [NISHI TAKASHI](https://appshunter.io/developer/837194947) |

## 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


### ファイルサイズチェッカー

[App page](https://appshunter.io/ios/app/id1358614632)

**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 ファイルサイズチェッカー free?

ファイルサイズチェッカー is free to download, with no in-app purchases.

### Do 年号電卓Plus or ファイルサイズチェッカー have ads?

ファイルサイズチェッカー shows ads; 年号電卓Plus does not.

### Which is updated more often, 年号電卓Plus or ファイルサイズチェッカー?

年号電卓Plus ships an update every 6 weeks, and ファイルサイズチェッカー every 9 months. Most recently, 年号電卓Plus was updated on October 12, 2026 and ファイルサイズチェッカー on October 5, 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.*