# eventLoop vs Koyomi

The clearest difference is price: eventLoop at Free against Koyomi's $1.99. Koyomi's advantage is in-app purchases (none vs 1) and ads (none vs shown).

eventLoop is free to download; Koyomi costs $1.99 up front. eventLoop sells 1 one-off in-app purchase. Koyomi asks for nothing beyond the download.

eventLoop ships an update every 3 months, Koyomi every 5 weeks. Both last shipped on September 23, 2026.

## The numbers

| Metric | eventLoop | Koyomi |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/koyomi/id926113841/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 58.3% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Every 5 weeks** |
| Monetization | — | Free |
| Size | 15 MB | 18 MB |
| Requires iOS | 12.0 | **9.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Mac, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [KENJI KANEMOTO](https://appshunter.io/developer/402720982) | [iWare Inc.](https://appshunter.io/developer/720005589) |

## What reviewers say

### eventLoop

[App page](https://appshunter.io/ios/app/eventloop/id483681104)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Eliminate Ads | $0.99 | one-time |


### Koyomi

[App page](https://appshunter.io/ios/app/koyomi/id926113841)

This app displays traditional Japanese calendars, including lunar phases, zodiac signs, and auspicious days. It integrates with your existing iOS calendar and offers features like printing and PDF sharing. Perfect for those who appreciate traditional calendrical information.

**Highlights:** Standard calendar import and display, Detailed Japanese calendar view (zodiac, lunar, etc.), Moon phase and age display, Calendar printing and PDF sharing, Widget support, Monthly/yearly/list calendar views, Sunrise and sunset times

**Features:** Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is eventLoop free?

eventLoop is free to download, with in-app purchases available.

### Is Koyomi free?

Koyomi costs $1.99, with no in-app purchases.

### Do eventLoop or Koyomi have ads?

eventLoop shows ads; Koyomi does not.

### Which is updated more often, eventLoop or Koyomi?

eventLoop ships an update every 3 months, and Koyomi every 5 weeks. Most recently, eventLoop was updated on September 23, 2026 and Koyomi on September 23, 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.*