# 年号電卓Plus vs Simple Calculator Multi

The clearest difference is update cadence: 年号電卓Plus at every 6 weeks against Simple Calculator Multi's every 13 months. Simple Calculator Multi's advantage is iOS requirement (15.1 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, Simple Calculator Multi every 13 months. The most recent releases landed on October 12, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | 年号電卓Plus | Simple Calculator Multi |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 37.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 13 months |
| Monetization | Free | — |
| Size | 7 MB | 25 MB |
| Requires iOS | 17.6 | **15.1** |
| Devices | iPhone, Apple Watch | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nakanishi Toshihiko](https://appshunter.io/developer/712843914) | [tadashi endo](https://appshunter.io/developer/1605441215) |

## 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


### Simple Calculator Multi

[App page](https://appshunter.io/ios/app/simple-calculator-multi-screen/id1605441213)

**Features:** macOS Compatibility, Vision Pro support

**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 Simple Calculator Multi free?

Simple Calculator Multi is free to download, with no in-app purchases.

### Do 年号電卓Plus or Simple Calculator Multi have ads?

Neither 年号電卓Plus nor Simple Calculator Multi shows ads.

### Which is updated more often, 年号電卓Plus or Simple Calculator Multi?

年号電卓Plus ships an update every 6 weeks, and Simple Calculator Multi every 13 months. Most recently, 年号電卓Plus was updated on October 12, 2026 and Simple Calculator Multi on October 2, 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.*