Jカレンダー vs FirstSeed Calendar
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Jカレンダー
This app offers a visually customizable calendar with Japanese holidays, lunar phases, and traditional Japanese calendars. Add photos and notes to your events, and enjoy daily quotes. It syncs with your device's calendar for seamless scheduling.
- Japanese holidays and traditional calendars (Rokuyo, lunar phases)
- Photo and note customization for events
- Daily quotes and sayings
- Syncs with device calendar
- Customizable visual themes
- Recurring event scheduling
Read full descriptionHide full description
祝日の表示はもちろん、六曜や月齢、二十四節気を見やすく表示。 冠婚葬祭や釣りの日程を決めるのにも便利です。 写真を入れられるので、紙でもらったお知らせなどを予定と一緒に登録するとさらに便利! 月表示では予定が一目でわかるようになっているので、 スケジュール管理にも使いやすい! メモを残すこともできちゃいます。 六曜や月齢表示を消すと、シンプルなカレンダーに早変わり! 上部の画像も変更できるので、自分だけの見た目のカレンダーにカスタマイズもできますよ! 日表示は見慣れた日めくりカレンダー風デザイン。 定型予定を登録できるので、 同じ予定を入れるのがとても楽チン。 今日は何の日?いい服(1129)の日! などなど、その日が何の日かも表示されます。 母の日や、土用の丑の日などもわかっちゃいます! 日替わりで素敵な格言や名言を載せているので、ちょっと見るだけでも楽しめます。 また、それぞれの日に写真やメモを入れることもできるので、ちょっとした日記がわりに使うこともできますよ! 日本人にとっての使い勝手を徹底したカレンダーアプリです。 ぜひ使ってみてください。 #ユーザー様の声 ・六曜があるのは便利。和風でさわやかなデザインも気に入りました。 ・約半年使ってみて 機能は使いやすいです。私には一番良いかも また格言のチョイスが良くて 結構見ちゃいます。 ・曜日の情報が六曜など細かいです。また標準のカレンダーと同期するから非常に便利です。満点ですよ。 ・スケジュールを入れやすいし、画像もOK!もっと早く入れていればよかった…と思っています。 ・繰り返し使いたい予定を長押しで登録しておけるのが便利です。 六曜の表示も、信心深い方ではないが、あると和を感じます。 URLスキーム:net.ysakaki.JCalendar:// #1ヶ月以上前の予定が消えてしまう場合# 「設定」アプリで「カレンダー」の「同期」という項目を「全てのイベント」に変更してください
FirstSeed Calendar
A powerful scheduling app that manages both events and reminders. It offers innovative calendar views, interactive widgets for various iOS versions, and seamless syncing with Apple's Calendar and Reminders apps. An optional paid upgrade unlocks advanced features like natural language event processing and drag-and-drop functionality.
- Interactive and lock-screen widgets
- Full-featured month, week, and list views
- Event and reminder management
- Natural language event processing (paid)
- Drag & drop event manipulation (paid)
- Apple Watch support
- Syncs with Apple Calendar and Reminders
Read full descriptionHide full description
FirstSeed Calendar is a scheduling app that handles both events and reminders with the following great features: - Added support for Liquid Glass, as well as clear widgets and icons in iOS 26. - Supports Control Center & lock-screen buttons as well as dark & tinted app icons in iOS 18. - Supports interactive widgets and standby widgets in iOS 17, as well as Smart Stacks in watchOS 10. - Supports lock-screen widgets, weather and focus filter in iOS 16. - Apple Watch support - Full-featured month view with single-handed operation for most common tasks - Innovative week view that eliminates the need for vertical scrolling - List view that shows events like paper organizer - Access to reminders - Ability to move and duplicate events - Show notes in full screen - Smooth scrolling of calendar views - And much more! A paid upgrade is available to access these excellent extra features: - Quick event that processes natural language (English, German, French, Spanish, Japanese) - Week number, time zone, and event history - Drag & drop to move events - Template to create similar events repeatedly - Calendar set to show or hide calendars with a single tap - Apple Watch app settings - Different app icons - And more! FirstSeed Calendar syncs with Apple's "Calendar" app, so you can use iCloud calendar or other online calendars to sync your events across all devices. It also syncs with Apple's "Reminders" app, so you can use iCloud to sync your reminders across all devices. The new reminders in iOS 13 and macOS Catalina is only partially supported. For example, sub reminders show up as no-due reminders. Full support will be provided in the future update.
Screenshots
Verdict
The clearest difference is update cadence: FirstSeed Calendar at every 10 days against Jカレンダー's monthly. FirstSeed Calendar also leads on review sentiment (81% vs 66%) and ratings volume (330 vs 27). Jカレンダー's advantage is rating (4.9 vs 4.7) and iOS requirement (16.6 vs 26.0). On price, ads, in-app purchases and monetization model 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
Both are free to download. Jカレンダー sells 1 one-off in-app purchase and FirstSeed Calendar sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.
Jカレンダー holds the better App Store score, 4.9 against 4.7. That said, the two scores are not equally well evidenced: FirstSeed Calendar has 330 ratings behind it against 27, so its average is the more settled of the two. Written reviews complicate that: 66% of Jカレンダー's written reviews are positive against 81% of FirstSeed Calendar's, so the app with the better star average is not the one people write more warmly about.
Jカレンダー ships an update monthly, FirstSeed Calendar every 10 days. The most recent releases landed on September 23, 2026 and September 24, 2026 respectively.
| Parameter | Jカレンダー | FirstSeed Calendar |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (27 ratings) — better | 4.7 (330 ratings) |
| Positive reviews | 65.5% of reviews | 80.6% of reviews — better |
| Number of ratings | 27 | 330 — better |
| Update frequency | Monthly | Every 10 days — better |
| Ads | Yes | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone | iPhone, iPad, Apple Watch — better |
| Requires iOS | 16.6 — better | 26.0 |
| Further details — not scored | ||
| Size | 22 MB | 61 MB |
| Age rating | 4+ | 4+ |
| Developer | PiyoLog Inc. | FirstSeed Inc |
Customer experience
Jカレンダー
FirstSeed Calendar
In-app purchases
Jカレンダー
- 広告非表示$2.99
FirstSeed Calendar
- Monthly Donation$2.991 Month
- Pro Version$9.99
Questions
Is Jカレンダー free?
Is FirstSeed Calendar free?
Which has better reviews, Jカレンダー or FirstSeed Calendar?
Do Jカレンダー or FirstSeed Calendar have ads?
Which is updated more often, Jカレンダー or FirstSeed Calendar?
Other comparisons















