ShareDiary(シェアダイアリー) vs Whatcha Diary
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ShareDiary(シェアダイアリー)
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ShareDiary は複数の相手と日記を共有できる交換日記サービスです。 家族や友だち、恋人など様々なシーンでご利用いただけます。 公式サイト https://sharediary.konnyaku256.dev/ プライバシーポリシー https://sharediary.konnyaku256.dev/privacy-policy 利用規約 https://sharediary.konnyaku256.dev/terms-and-conditions [:mav: 1.6.1]
Whatcha Diary
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Whatcha - A group diary, built for how memories actually happen together Traditional social apps broadcast from one person to many. Whatcha is different: one group, multiple people, one shared story — built for couples, classrooms, teams, and friends who want to record memories together. 【Key Features】 ・A History Where Nothing Is Lost Every save keeps the diary as it was. See who added what, go back to an earlier version at any time, and bring two accounts of the same day together into one. ・Group-First, Not Solo-First Every diary belongs to a group. Invite the people who matter, and build one shared story together instead of broadcasting to strangers. ・Fine-Grained Permissions Control exactly who can create, read, update, or delete entries in each group — down to the individual member. ・Calendar & Card Views Browse your shared memories by month or as a scrollable feed — however you like to look back. 【Recommended for】 ・Couples who want a shared diary of their relationship ・Classrooms and teams keeping a shared log ・Friends documenting a trip together ・Anyone tired of broadcasting to an audience instead of sharing with people who matter Start your shared story on Whatcha today.
Screenshots
Verdict
The clearest difference is update cadence: Whatcha Diary at every 6 days against ShareDiary(シェアダイアリー)'s every 2 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.
ShareDiary(シェアダイアリー) ships an update every 2 months, Whatcha Diary every 6 days. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.
| Parameter | ShareDiary(シェアダイアリー) | Whatcha Diary |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | Every 6 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 15.6 — better | 16.0 |
| Further details — not scored | ||
| Size | 32 MB | 84 MB |
| Age rating | 4+ | 4+ |
| Developer | Shuntaro Shimada | Takanori Nagashima |
In-app purchases
ShareDiary(シェアダイアリー)
No in-app purchases
Whatcha Diary
No in-app purchases





