MiiBook Journal Downloads & RevenueMiiBook Journal: Private Diary · App Store
Not in any tracked top chart right now.
Updated 2 Nov 2026 · rankings refresh through the day
DeveloperRyunosuke Nagase
CategoryLifestyle
PriceFree
Released
Rating★ 4.7 (331)
Version6.2.3
Age rating4+
First seen by us
12 Oct 2026
MiiBook Journal: Private Diary update history & changes
Last change · 4 events since 18 Jul 2023Full timeline ↓🆕First spotted by AppInsider🆕Its developer released another app: Yondo Todoリストをロック画面に。シンプルタスク管理📦Version 6.2.2
Full timeline · 4 events
- 🆕MiiBook Journal: Private Diary first spotted by AppInsiderJapan (found via developer)
- 🆕MiiBook Journal: Private Diary: its developer released another app: Yondo Todoリストをロック画面に。シンプルタスク管理
- 📦MiiBook Journal: Private Diary version 6.2.2- Bug fixes and performance improvements.
- 🆕MiiBook Journal: Private Diary released on the App Store
Collected from the stores by AppInsider since we first spotted the app. Dates are when we saw each change.
Rating
4.7 ★
331 ratings
Measured
MiiBook Journal: Private Diary on the App Store
App details
App ID
6451179720
Publisher
Ryunosuke Nagase
On the store since
Jul 2023
3 years on the store
Minimum OS
iOS 15.0+
iPhone 6s and later
Devices
iPhone · iPad
Universal purchase
Content rating
4+
Languages
2
EN JA
Size
146 MB
Also listed in
Health & Fitness
Where it ranks now
Every top chart it appears in across 30 countries.
| Country | Charts | Rank |
|---|---|---|
| Not charting right now. | ||
Ratings
App Store, worldwide.
Rating
4.7 ★
331 ratings
Measured
Ratings
331
Measured
About MiiBook Journal: Private Diary
MiiBook is your simple, personal diary app. We've made a conscious effort to provide a clean, engaging design that you won't tire of.
Operation is easy, with no account registration required. Simply install the app and start using it immediately.
【Features】
・Write a quick line or take your time
・Instant entry upon opening the app
・Easy reflections via calendar
・Switch calendar views by month
・Dark mode compatible
・Never forget to log with reminder notifications
・Only you have access to your data
・Home Widget
・AI automatically generates monthly summaries!
■ Write a quick line or take your time
On busy days, jot down a single line. When you have time, write in detail. With the freedom to match your mood, keeping a daily diary is easier than ever.
■ Instant entry upon opening the app
MiiBook is committed to a user-friendly experience. Tap the blank date field from the home screen and the keyboard appears for immediate input.
■ Easy reflections via calendar
You can reflect on your diary entries in a calendar format. Reviewing past entries can help you recognize your personal growth and emotional changes.
■ Switch calendar views by month
Simply swipe left or right to review your past records.
■ Dark mode compatible
The app is friendly on the eyes and also supports dark mode. The theme switches according to your device settings. Enjoy the app in your favorite theme.
■ Never forget to log with reminder notifications
Of course, reminder notifications are also supported. We support the habit of daily journaling with daily notifications. You can also turn off notifications.
■ Only you have access to your data
Your journal entries are stored only on your device. Therefore, you can comfortably record your thoughts and feelings.
【Recommended for those who】
・Felt other diary apps were complicated with unnecessary features.
・Want to use a simple diary app.
・Desire a diary app that they won't tire of.
・Prefer an app that allows quick and easy entries.
・Prioritize privacy and want their data stored only on their device.
Terms of Use: https://tinylab-apps.web.app/TermsOfService/ja.html
Privacy Policy: https://tinylab-apps.web.app/PrivacyPolicy/ja.html
Operation is easy, with no account registration required. Simply install the app and start using it immediately.
【Features】
・Write a quick line or take your time
・Instant entry upon opening the app
・Easy reflections via calendar
・Switch calendar views by month
・Dark mode compatible
・Never forget to log with reminder notifications
・Only you have access to your data
・Home Widget
・AI automatically generates monthly summaries!
■ Write a quick line or take your time
On busy days, jot down a single line. When you have time, write in detail. With the freedom to match your mood, keeping a daily diary is easier than ever.
■ Instant entry upon opening the app
MiiBook is committed to a user-friendly experience. Tap the blank date field from the home screen and the keyboard appears for immediate input.
■ Easy reflections via calendar
You can reflect on your diary entries in a calendar format. Reviewing past entries can help you recognize your personal growth and emotional changes.
■ Switch calendar views by month
Simply swipe left or right to review your past records.
■ Dark mode compatible
The app is friendly on the eyes and also supports dark mode. The theme switches according to your device settings. Enjoy the app in your favorite theme.
■ Never forget to log with reminder notifications
Of course, reminder notifications are also supported. We support the habit of daily journaling with daily notifications. You can also turn off notifications.
■ Only you have access to your data
Your journal entries are stored only on your device. Therefore, you can comfortably record your thoughts and feelings.
【Recommended for those who】
・Felt other diary apps were complicated with unnecessary features.
・Want to use a simple diary app.
・Desire a diary app that they won't tire of.
・Prefer an app that allows quick and easy entries.
・Prioritize privacy and want their data stored only on their device.
Terms of Use: https://tinylab-apps.web.app/TermsOfService/ja.html
Privacy Policy: https://tinylab-apps.web.app/PrivacyPolicy/ja.html
Latest updates
6.2.3
- Bug fixes and performance improvements.
6.2.2
- Bug fixes and performance improvements.