Itsu vs シンプル誕生日カレンダー
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Itsu
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"Itsu-Log" is an application that can record "what did you do" and "when did you do". "When did you replace the toothbrush?" "When did you mow the lawn?" I don't do it every day. But you want to do it regularly, right? Why not record the date you did it? In addition, if you register the next scheduled date, you will be notified. (Of course, the notification can be turned off.)
シンプル誕生日カレンダー
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最もシンプルで直感的に利用ができる誕生日カレンダーです。 制限なしで登録が可能です。 --機能 ・リスト表示 ・カレンダー表示 ・誕生日の追加/削除
Screenshots
Verdict
Itsu and シンプル誕生日カレンダー are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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.
Itsu ships an update every 14 months, シンプル誕生日カレンダー every 8 months. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.
| Parameter | Itsu | シンプル誕生日カレンダー |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 14 months | Every 8 months — better |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 6 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | risaiku LLC. | gen endo |
In-app purchases
Itsu
No in-app purchases
シンプル誕生日カレンダー
No in-app purchases









