Koyomi vs OneHandClock (Pro version)
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Koyomi
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.
- 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
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機能 ・標準カレンダー読込、表示 ・暦を表示 ・日付・曜日・干支・九星・旧暦・潮名・歴日・終日・二十八宿・中段・下段 ・月相、月齢表示 ・カレンダーの印刷 ・「ロルト」でカレンダーの印刷 ・年齢早見表 ・カレンダーをPDFとして共有(Open in…/アクティビティーで他のアプリにPDFを渡せます) ・ウィジェットに対応(通知センターの「今日」に表示します) ・月間/年間/一覧カレンダー表示 ・暦日の検索機能(二十四節気・七十二候・雑節・選日・干支・祝日) ・日の出、日の入り時刻 ・横表示機能 日本人が古くから利用してきた暦には干支・九星・六曜・二十四節気などの歴日があります。 大安は婚礼、旅行、引越、開店などに吉の日 仏滅は全てのことに悪い凶とされる日 先勝は急ぐことや、訴訟などに吉の日、ただし午後からは凶 先負は静かにするのが吉の日 勝負ごとや急用はさけた方がよい日、ただし午後は吉 友引は朝晩は吉の日、正午だけが凶の日、葬式をつつしむ日 赤口は何事をするのにも凶とされる日 ただし正午頃は吉の日 干支は十干と十二支の組み合わせからなる六十干支から成り立ち六十年周期で、日取りや方位などを判断する基になります。 二十四節気は太陽の通り道を24等分した分割点の日を節気とし、陰暦では季節にずれが生じるため季節の指標として用いられました。 そんな日本人が利用している暦をiPhoneで簡単に表示できるのが「こよみ」アプリです。暦なんて気にしないよ、 と言うひとでも、結婚式の日がふさわしい日かどうか知っていた方が知らないよりは良いですよね? 効率や成果を重要視する現代ですが、「はじまり」の日を縁起の良い日からはじめてみませんか? 使い方は簡単!アプリを起動するだけで、月の全ての干支、九星、六曜、二十四節気、その他の雑節が簡単に見られます。 それに、iOSの標準カレンダーも読み込めるので、予定と暦が一度に確認出来ます。 カレンダーの印刷や共有ができます。 watchOSに対応しています。
OneHandClock (Pro version)
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.
- 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
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This is a one needle clock. Let's feel the passage of calm time. It is also compatible with iPad. - One-stitch clock -> 24-hour clock. The day-time is an upper half and the night-time is a lower half. -> 12-hour clock. -> The smallest scale division is 10 minutes. - Three-stitch clock - > The second hand is a clock which gains smoothly. - You can change the position and size of the clock. - You can choose a camera image or a photo as the background of the clock. - Please write a favorite character in a dial and make it your clock. - If it puts sideways, a status bar will not be displayed. - When continuing displaying in "Auto sleep"-off, we recommend you to connect with a power supply. There is also a free version of the one-hand clock with the same functions.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Koyomi | OneHandClock (Pro version) |
|---|---|---|
| Price | $1.99 | $1.99 |
| Rating | 5.0 (2 ratings) | 5.0 (2 ratings) |
| Positive reviews | 58.3% of reviews | 66.7% of reviews — better |
| Number of ratings | 2 | 2 |
| Update frequency | Every 5 weeks — better | Every 6 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad, iPod, Mac, Apple Watch — better | iPhone, iPad, iPod |
| Requires iOS | 9.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 18 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | iWare Inc. | Keietsu Yasuhara |
Customer experience
Koyomi
OneHandClock (Pro version)
In-app purchases
Koyomi
No in-app purchases
OneHandClock (Pro version)
No in-app purchases
Questions
Is Koyomi free?
Is OneHandClock (Pro version) free?
Which has better reviews, Koyomi or OneHandClock (Pro version)?
Do Koyomi or OneHandClock (Pro version) have ads?
Which is updated more often, Koyomi or OneHandClock (Pro version)?
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