Koyomi (Calendar) vs PLAN KUMA
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Koyomi (Calendar)
This simple calendar app displays three months at a time, along with an annual view. Easily navigate between months and years with intuitive scrolling gestures. It offers a straightforward yet highly useful way to manage your schedule.
- Three-month calendar view
- Annual calendar view
- Intuitive scrolling navigation
- Simple and useful interface
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"Koyomi" is the calendar app to show the three month at once. It also can show the annual calendar. You can change the year by the up/down scroll on the annual calendar. You can also change the month by the left/right scroll, the year by the up/down scroll on the three month screen. This app is very simple, but very useful!
PLAN KUMA
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[PLAN KUMA]は、かんたんでシンプルなプラン帳です。 日程とメモ、関連したURLを時系列に書き込むことができます。 旅行やデート、タスク管理にどうぞ。 [主な機能] - プランごとにタイトル管理 ※追加制限無し - 日時・項目・メモ・関連URLを時系列に表示 - プランのメイン画像を設定（アルバム・ランダム画像より選択） - プランの画像保存 - メール・LINEにてプランの共有（画像orテキストの選択） - プランの保護・削除 - パスワード設定 [こんな方へおすすめ] - 旅行やデートの日程をかんたんに作りたい - 分かりやすく日程を確認したい - 電車の時間を乗り換えごとに書き込みたい - 場所＋URLですぐに詳細や地図をすぐに見たい - 行った場所や時間を残しておきたい - 作ったプランを誰かと共有したい - 日々のタスクを管理したい
Screenshots
Verdict
The clearest difference is update cadence: Koyomi (Calendar) at every 3 months against PLAN KUMA's every 48 months. PLAN KUMA's advantage is iOS requirement (9.0 vs 16.6). On price, ads, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Koyomi (Calendar) ships an update every 3 months, PLAN KUMA every 48 months. The most recent releases landed on November 2, 2026 and October 29, 2026 respectively.
| Parameter | Koyomi (Calendar) | PLAN KUMA |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 85.7% of reviews | — |
| Update frequency | Every 3 months — better | Every 48 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 16.6 | 9.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | Kouichi Abe | YUUKI ENDO |
In-app purchases
Koyomi (Calendar)
No in-app purchases
PLAN KUMA
No in-app purchases
