Happy vs MooLog
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Happy
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Happy-Diaryは，あなたを幸せにするアプリです。 あなたが感じた幸せを日々書き記していくことで、あなたが今どれだけ幸せなのかを知ることができます。 また、過去に書き記した幸せな出来事を振り返ってみることで、あなたを幸せな気持ちにさせることができます。
MooLog
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Description: This app allows you to record and visualize your daily moods and events using scores and notes. Organize your entries by category, view trends through graphs, and review your scores on a calendar. Gain insights into your daily life and well-being with ease. Key Features: - Record daily events with scores and notes - Categorize entries for better organization - Visualize trends with interactive graphs - Review scores using a calendar view - User-friendly interface for seamless tracking Privacy Policy and Terms of Use are available within the app.
Screenshots
Verdict
The clearest difference is update cadence: MooLog at daily against Happy's every 4 months. 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.
Happy ships an update every 4 months, MooLog daily. The most recent releases landed on October 25, 2026 and October 28, 2026 respectively.
| Parameter | Happy | MooLog |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 4 months | Daily — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 12.0 | 12.0 |
| Further details — not scored | ||
| Size | 136 MB | 108 MB |
| Age rating | 4+ | 4+ |
| Developer | Kengo Sasaki | Satoshi Yokokawa |
In-app purchases
Happy
No in-app purchases
MooLog
No in-app purchases
