Comparison

16文字日記 vs MiiBook Journal

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

16文字日記

This app allows users to record their daily thoughts and memories using only 16 characters. It's designed for those who find long journaling difficult or are short on time, making it easy to maintain a daily record and review past entries.

Highlights
  • 16-character daily entries
  • Monthly calendar view
  • Writing reminders
  • Passcode lock
  • Easy to continue daily
Features
Read full description

長文を書かなくていい、16文字だけの日記アプリ。 1日ひとことで残せるから、日記が続かない人でも気軽に続けやすい。 思いついたらすぐ書けて、あとで月ごとの一覧から見返せます。 16文字日記は、 「日記を書きたいけど長くは続かない」 「その日のことを少しだけ残したい」 そんな人のための、短文特化の日記アプリです。 ・長文を書くのがしんどい ・忙しい日でも少しだけ記録したい ・あとで気軽に振り返りたい ・1日を16文字以内でシンプルに記録 ・月ごとの一覧で日々の記録を見返せる ・リマインダーで書き忘れをやさしくサポート ・パスコードロックで安心して残せる たくさん書かなくていいから、続けやすい。 16文字だけで、毎日の思い出を気軽に残してみてください。

About

MiiBook Journal

This personal diary app offers a clean and engaging interface for easy daily journaling. It allows for quick entries, calendar reflections, and automatic monthly summaries. Prioritizing privacy, all data is stored locally on your device.

Highlights
  • Instant entry upon opening
  • Calendar reflections
  • AI monthly summaries
  • Dark mode support
  • Reminder notifications
  • Home Widget
  • Local data storage
Read full description

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

Screenshots

16文字日記4 screens
MiiBook Journal4 screens

Verdict

The call

The clearest difference is in-app purchases: 16文字日記 at none against MiiBook Journal's 3. MiiBook Journal's advantage is update cadence (monthly vs every 2 months) and review sentiment (63% vs 50%). On price, ads, device support and iOS requirement 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. MiiBook Journal sells 3 in-app purchases, starting at $1.99 per month. 16文字日記 asks for nothing beyond the download.

UpkeepUpdate frequency

16文字日記 ships an update every 2 months, MiiBook Journal monthly. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.

Scorecard4 real differences · 6 level
16文字日記 versus MiiBook Journal: the parameters behind the verdict, then further details
Parameter16文字日記MiiBook Journal
PriceFreeFree
Rating—4.8 (5 ratings) — better
Positive reviews50.0% of reviews62.5% of reviews — better
Number of ratings—5 — better
Update frequencyEvery 2 monthsMonthly — better
AdsYesYes
In-app purchasesNo — betterYes
MonetizationAd-supported — betterFree with in-app purchases
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS15.015.0
Further details — not scored
Size75 MB153 MB
Age rating4+4+
DeveloperKenta FukushimaRyunosuke Nagase

Customer experience

16文字日記

Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

MiiBook Journal

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews16 reviews
Positive62.5%
Neutral0.0%
Negative37.5%

In-app purchases

None

16文字日記

No in-app purchases

3 purchases

MiiBook Journal

Subscriptions2
  • PREMIUM - MONTHLY$1.991 Month
  • PREMIUM - ANNUAL14 Days trial$22.991 Year
One-time1
  • PREMIUM - LIFETIME$49.99

Questions

Is 16文字日記 free?
16文字日記 is free to download, with no in-app purchases.
Is MiiBook Journal free?
MiiBook Journal is free to download, with in-app purchases available.
Do 16文字日記 or MiiBook Journal have ads?
Both 16文字日記 and MiiBook Journal show ads.
Which is updated more often, 16文字日記 or MiiBook Journal?
16文字日記 ships an update every 2 months, and MiiBook Journal monthly. Most recently, 16文字日記 was updated on October 27, 2026 and MiiBook Journal on October 24, 2026.

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