# 年号電卓+ vs 図書館蔵書検索

The clearest difference is ads: 年号電卓+ at none against 図書館蔵書検索's shown. 年号電卓+ also leads on update cadence (every 2 weeks vs every 5 months). On price, in-app purchases, device support and iOS requirement 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+ ships an update every 2 weeks, 図書館蔵書検索 every 5 months. The most recent releases landed on August 26, 2026 and August 15, 2026 respectively.

## The numbers

| Metric | 年号電卓+ | 図書館蔵書検索 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 2 weeks** | Every 5 months |
| Monetization | Free | — |
| Size | 0 MB | 3 MB |
| Requires iOS | **15.6** | 16.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [SHINICHI KANEDA](https://appshunter.io/developer/1061887320) | [hirokazu murabe](https://appshunter.io/developer/894364772) |

## What reviewers say

### 年号電卓+

[App page](https://appshunter.io/ios/app/plus/id1061887321)

This calculator-style app allows you to easily convert between Japanese eras and Western years, and calculate ages. Input a year or age to see the corresponding era and Western year, accommodating birth month and day flexibility. You can also customize era keys for quick access.

**Highlights:** Era to Western year conversion, Western year to era conversion, Age calculation, Flexible birth date handling, Customizable era keys

**Features:** macOS Compatibility

**In-app purchases:** none


### 図書館蔵書検索

[App page](https://appshunter.io/ios/app/id1068064173)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 年号電卓+ free?

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

### Is 図書館蔵書検索 free?

図書館蔵書検索 is free to download, with no in-app purchases.

### Do 年号電卓+ or 図書館蔵書検索 have ads?

図書館蔵書検索 shows ads; 年号電卓+ does not.

### Which is updated more often, 年号電卓+ or 図書館蔵書検索?

年号電卓+ ships an update every 2 weeks, and 図書館蔵書検索 every 5 months. Most recently, 年号電卓+ was updated on August 26, 2026 and 図書館蔵書検索 on August 15, 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.*