Mui vs Kawaii Diary
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Mui
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Mui - 幸せのための時間管理アプリは、 あなたがホントに幸せな時間を過ごせたかをチェックするアプリです。 「時は金なり」という言葉がありますが、 金だけあって幸せになれないなら意味がないですよね。 幸せな時間をキレイなグラフで視える化します。 幸福を感じる時間が長いほど、幸福度が高く、本当の人生を歩む手助けになります。 「時は幸せなり」を作るためのアプリ。 それが Mui なのです。 幸福な時間を増やして、公開しない人生をつくっていきましょう!
Kawaii Diary
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How was your day? Pick one stamp, write a line, and you're done. Kawaii Diary is a diary you can actually keep — about a minute a day. Keeping a diary is hard when every entry has to be an essay. On the days you have nothing to say, a mood stamp and a photo are enough. Write a lot when you want to. Write nothing when you don't. ■ Your mood, as a stamp Happy, glad, troubled, sleepy — eight stamps to choose from, one per day. Add the weather too: sunny, cloudy, rainy, umbrella, or snow. ■ Up to six photos a day The view, the meal, the thing you bought. Pick several at once and they're added in order. In a saved entry, tap a photo to see it full screen. ■ Templates, so you never face a blank page Gratitude journal, daily review, one-line diary, tomorrow's plan, and a blank page. You can add your own, too. ■ This day, a year ago Memory shows what you wrote on the same date one and two years back. The longer you keep it, the better that screen gets. ■ A calendar that shows your streak Every day you write gets its mood stamp on the calendar. See how many days you wrote this month, and which mood came up most. ■ Little milestones Your first entry, ten days, thirty days. An entry with a photo. Five different moods. Each one unlocks an achievement, with a small celebration. ■ One gentle reminder A single daily reminder, at whatever time suits you. That's the only notification — nothing else buzzes. ■ Your diary stays on your device No account, no sign-in. Entries are stored on your iPhone. iCloud backup is optional and can be turned on or off any time, so a new phone can pick up right where you left off. 【Made for you if】 ・You've tried to keep a diary and stopped ・You'd rather not write paragraphs, but want to keep something ・You want to look back on how you were feeling ・You like leaving a short note next to a photo ・You like apps that look cute 【Details】 ・iPhone / iOS 17.0 or later ・Japanese and English (follows your device language) ・Free to use (the app shows ads) Just today's entry. That's all it takes.
Screenshots
Verdict
The clearest difference is update cadence: Mui at every 2 days against Kawaii Diary's every 2 months. Mui also leads on device support (3 vs 1) and iOS requirement (9.0 vs 17.0). On price, ads and in-app purchases 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.
Mui ships an update every 2 days, Kawaii Diary every 2 months. The most recent releases landed on October 25, 2026 and October 23, 2026 respectively.
| Parameter | Mui | Kawaii Diary |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 days — better | Every 2 months |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 9.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 61 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Haga Kunihiko | Jun Tsuda |
In-app purchases
Mui
No in-app purchases
Kawaii Diary
No in-app purchases









