# 年号電卓Plus vs Visa Nippon

The clearest difference is update cadence: 年号電卓Plus at every 6 weeks against Visa Nippon's every 31 months. Visa Nippon's advantage is iOS requirement (11.0 vs 17.6). On price, ads, 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, Visa Nippon every 31 months. The most recent releases landed on July 27, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | 年号電卓Plus | Visa Nippon |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 37.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 31 months |
| Monetization | Free | — |
| Size | 7 MB | 27 MB |
| Requires iOS | 17.6 | **11.0** |
| Devices | iPhone, Apple Watch | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Nakanishi Toshihiko](https://appshunter.io/developer/712843914) | [KTC.CO.,Ltd](https://appshunter.io/developer/516464543) |

## 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


### Visa Nippon

[App page](https://appshunter.io/ios/app/visa-nippon/id1488278526)

**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 Visa Nippon free?

Visa Nippon is free to download, with no in-app purchases.

### Do 年号電卓Plus or Visa Nippon have ads?

Neither 年号電卓Plus nor Visa Nippon shows ads.

### Which is updated more often, 年号電卓Plus or Visa Nippon?

年号電卓Plus ships an update every 6 weeks, and Visa Nippon every 31 months. Most recently, 年号電卓Plus was updated on July 27, 2026 and Visa Nippon on September 13, 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.*