# Koyomi vs OneHandClock (Pro version)

The clearest difference is monetization model: Koyomi at free against OneHandClock (Pro version)'s paid. Koyomi also leads on device support (5 vs 3) and iOS requirement (9.0 vs 15.0). OneHandClock (Pro version)'s advantage is review sentiment (67% vs 58%). On price, rating, ratings volume and update cadence there is nothing between them.

Koyomi costs $1.99 and OneHandClock (Pro version) $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for Koyomi against 5.0 for OneHandClock (Pro version). Both are backed by a comparable volume of ratings — 2 and 2 respectively. Written reviews are what separate them: 58% of Koyomi's written reviews are positive against 67% of OneHandClock (Pro version)'s.

Koyomi ships an update every 5 weeks, OneHandClock (Pro version) every 6 weeks. The most recent releases landed on October 16, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Koyomi | OneHandClock (Pro version) |
| --- | --- | --- |
| Price | $1.99 | $1.99 |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/koyomi/id926113841/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/onehandclock-pro-version/id6448864456/reviews) |
| Number of ratings | 2 | 2 |
| Positive reviews | 58.3% of reviews | **66.7% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 6 weeks |
| Monetization | **Free** | Paid |
| Size | 18 MB | 8 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | **iPhone, iPad, iPod, Mac, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [iWare Inc.](https://appshunter.io/developer/720005589) | [Keietsu Yasuhara](https://appshunter.io/developer/378538320) |

## What reviewers say

### 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


### OneHandClock (Pro version)

[App page](https://appshunter.io/ios/app/onehandclock-pro-version/id6448864456)

Experience a minimalist approach to timekeeping with a single-needle clock. Customize backgrounds, dial characters, and clock placement to create a unique visual timepiece. Enjoy both 24-hour and 12-hour formats with optional second-hand functionality.

**Highlights:** Single-needle clock design, 24-hour and 12-hour formats, Customizable clock position and size, Background image or camera feed, Customizable dial characters, Optional second hand

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

**In-app purchases:** none


## Frequently asked questions

### Is Koyomi free?

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

### Is OneHandClock (Pro version) free?

OneHandClock (Pro version) costs $1.99, with no in-app purchases.

### Which has better reviews, Koyomi or OneHandClock (Pro version)?

Koyomi and OneHandClock (Pro version) are both rated 5.0 out of 5 on the App Store, from 2 and 2 ratings respectively.

### Do Koyomi or OneHandClock (Pro version) have ads?

Neither Koyomi nor OneHandClock (Pro version) shows ads.

### Which is updated more often, Koyomi or OneHandClock (Pro version)?

Koyomi ships an update every 5 weeks, and OneHandClock (Pro version) every 6 weeks. Most recently, Koyomi was updated on October 16, 2026 and OneHandClock (Pro version) on October 17, 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.*