Comparison

Chouseisan vs MonoCal

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Chouseisan

This free scheduling app simplifies event organization for both personal and professional use. Easily create event pages and share URLs with guests to coordinate schedules efficiently. It's a top scheduling service in Japan, designed for smooth itinerary planning.

Highlights
  • Streamlines event scheduling
  • Easy event page creation
  • Shareable event URLs
  • Suitable for private and business use
  • Large user base in Japan
Features
Read full description

Chouseisan is a free and easy to use scheduling application that streamlines scheduling. By streamlining scheduling, you can organize all kinds of events smoothly. ■ One of the largest scheduling services in Japan This is the official application of Chouseisan, one of the largest scheduling applications in Japan with over 8 million monthly active users. ■ Streamlines scheduling for all types of events The simple user experience makes it easy for anyone to use, and it can be used for a wide range of itinerary coordination from private to business situations. ■ Just share the URL with your guests to schedule an event. You can create an event page easily by simply entering the name of the event and possible dates. In addition, the URL of the event page can be shared with guests via chat, etc., for easy scheduling. ■ Completely free of charge Chouseisan is completely free of charge.

About

MonoCal

Features
Read full description

MonoCalは、Apple Watchで日付をすばやく確認するためのシンプルな月間カレンダーです。 今日の日付を確認したいとき、今月の曜日の並びを見たいとき、祝日を確認したいときに、手首を見るだけで1か月全体を確認できます。 【主な機能】 ・1か月分の日付を一覧表示 ・今日の日付を見やすく表示 ・前月・翌月の確認 ・文字盤のコンプリケーションに対応 ・日曜日、土曜日、祝日の色を個別に設定 ・今日の印の色を設定 ・祝日の表示オン/オフ ・祝日の国・地域を選択 ・週の開始曜日を日曜日または月曜日から選択 祝日表示をオンにすると、選択した国・地域の祝日をカレンダーに反映できます。 祝日表示をオフにした場合は、祝日用の色付けも解除され、通常の曜日色で表示します。土曜日と日曜日の色設定には影響しません。 カレンダーの見やすさを保ちながら、必要な情報だけをシンプルに表示。 「今日の日付」「曜日」「祝日」を素早く確認することに特化した、Apple Watch専用の月間カレンダーです。 毎日使うものだからこそ、曜日の並びや色を自分の好みに合わせて調整できます。 Apple Watch専用。 買い切りで利用でき、サブスクリプションはありません。

Screenshots

Chouseisan4 screens

Verdict

The call

The clearest difference is price: Chouseisan at Free against MonoCal's $0.49. Chouseisan also leads on iOS requirement (15.6 vs 26.6). MonoCal's advantage is ads (none vs shown). On update cadence, in-app purchases and device support 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

CostPrice · In-app purchases · Ads · Monetization

Chouseisan is free to download; MonoCal costs $0.49 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Chouseisan ships an update fortnightly, MonoCal weekly. The most recent releases landed on November 7, 2026 and October 31, 2026 respectively.

Scorecard3 real differences · 7 level
Chouseisan versus MonoCal: the parameters behind the verdict, then further details
ParameterChouseisanMonoCal
PriceFree — better$0.49
Rating4.9 (43 ratings) — better—
Positive reviews75.0% of reviews—
Number of ratings43 — better—
Update frequencyFortnightlyWeekly — better
AdsYesNo — better
In-app purchasesNoNo
MonetizationAd-supported—
DevicesiPhone, iPodiPhone, iPad, Apple Watch — better
Requires iOS15.6 — better26.6
Further details — not scored
Size99 MB3 MB
Age rating4+4+
DeveloperMixtend Inc.kazuyoshi onozawa

In-app purchases

None

Chouseisan

No in-app purchases

None

MonoCal

No in-app purchases

Questions

Is Chouseisan free?
Chouseisan is free to download, with no in-app purchases.
Is MonoCal free?
MonoCal costs $0.49, with no in-app purchases.
Do Chouseisan or MonoCal have ads?
Chouseisan shows ads; MonoCal does not.
Which is updated more often, Chouseisan or MonoCal?
Chouseisan ships an update fortnightly, and MonoCal weekly. Most recently, Chouseisan was updated on November 7, 2026 and MonoCal on October 31, 2026.

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