# Koyomi (Calendar) vs 変数電卓+

The clearest difference is update cadence: 変数電卓+ at daily against Koyomi (Calendar)'s every 3 months. 変数電卓+ also leads on iOS requirement (12.0 vs 16.6). 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.

Koyomi (Calendar) ships an update every 3 months, 変数電卓+ daily. The most recent releases landed on October 12, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Koyomi (Calendar) | 変数電卓+ |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 85.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Daily** |
| Monetization | Free | — |
| Size | 2 MB | 27 MB |
| Requires iOS | 16.6 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Kouichi Abe](https://appshunter.io/developer/295852950) | [Takuya Nemoto](https://appshunter.io/developer/1817950976) |

## What reviewers say

### Koyomi (Calendar)

[App page](https://appshunter.io/ios/app/koyomi-calendar/id1105884989)

This simple calendar app displays three months at a time, along with an annual view. Easily navigate between months and years with intuitive scrolling gestures. It offers a straightforward yet highly useful way to manage your schedule.

**Highlights:** Three-month calendar view, Annual calendar view, Intuitive scrolling navigation, Simple and useful interface

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

**In-app purchases:** none


### 変数電卓+

[App page](https://appshunter.io/ios/app/plus/id6746694817)

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

**In-app purchases:** none


## Frequently asked questions

### Is Koyomi (Calendar) free?

Koyomi (Calendar) is free to download, with no in-app purchases.

### Is 変数電卓+ free?

変数電卓+ is free to download, with no in-app purchases.

### Do Koyomi (Calendar) or 変数電卓+ have ads?

Neither Koyomi (Calendar) nor 変数電卓+ shows ads.

### Which is updated more often, Koyomi (Calendar) or 変数電卓+?

Koyomi (Calendar) ships an update every 3 months, and 変数電卓+ daily. Most recently, Koyomi (Calendar) was updated on October 12, 2026 and 変数電卓+ on October 25, 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.*