# nikki - DIARY — Cool Diary

> A private diary app with photo insertion, chat notes, scheduling, and security. (iPhone/iPad app by REVOLAB Inc..)

- Source: https://appshunter.io/ios/app/nikki-diary/id921470934 (this page in markdown: same URL + `.md`)
- Developer: [REVOLAB Inc.](https://appshunter.io/developer/575787284)
- Category: Lifestyle, Utilities
- Price: Free with in-app purchases
- Rating: 5.00/5 from 5 App Store ratings · 54 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.6 · 30 MB
- Languages: Japanese
- Released: 2015-05-04
- Data updated: 2026-06-09
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/nikki-diary/id921470934/reviews.md

## What is nikki?

Wanna write your secret diary...??
Here is the perfect app for you!!

◎Functions
1. Pictures can be inserted into each article.
2. There is a memo function: You can take notes in a chat format.
3. It can be used as a schedule book by writing on a future date.
4. You can lock the app with a password. It corresponds also to Face ID, Touch ID.
5. There are various fun stamps.

◎Change the timeline theme as you like (3 types)
1. Pinboard type with an emphasis on photos
2. List type with an emphasis on articles
3. Calendar type with an emphasis on practicality

## Key features

- Insert pictures into diary entries
- Chat-style memo function
- Use as a future date schedule book
- Password and biometric app lock
- Various fun stamps
- Customizable timeline themes (Pinboard, List, Calendar)

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| 広告非表示（広告を外す） | $7.99 | one-time |
| 添付画像を10枚にUP | $2.99 | one-time |


## Recent user reviews (10 of 54)

All indexed reviews: https://appshunter.io/ios/app/nikki-diary/id921470934/reviews.md

### 1/5 — I need help

*2025-09-24, version 24.4.1*

Hii so I’m very interested in this app and I downloaded it but I’m not sure how to chnage the language to English

### 5/5 — Aesthetically pleasing app

*2019-06-21, version 9.4.0*

I love this app. I use it to write songs, how I’m feeling, and sometimes even stories. I like how it’s simple and straight forward with no over complicated options, or widgets.

### 5/5 — 楽しく使わせていただいています。

*2018-11-27, version 8.5.0*

ひとつできたら便利だなと思うのは
遡って日記を描きたい時などに、カレンダーの画面から日にちをタッチして、そのまま日記を書くを選択できたらとても楽です。

例えば2ヶ月前の日の日記を書きたいときなど、今のままだと日にちを選択するのにかなりスクロールしないといけないので、改良していただけたら嬉しいです。

よろしくお願いします。

### 5/5 — My comments on nikki

*2018-08-07, version 8.5.0*

The app is very useful and organized, i just with they could have the app language in more than Japanese. I’ll admit though at least this app will be helpful when i continue learning Japanese!
 さよなら,ありがとございます！

### 5/5 — 👍🏼

*2018-05-23, version 8.5.0*

Very useful app. 
シンプルで使いやすいと思います。
パスコードが設定できるのも他人に見られる心配がないので、とても助かっています。些細な事から自分の感じたことまで、ありのままに置いておける場所になってます😌

### 5/5 — 愛用してます

*2016-11-16, version 6.2.1*

機能もデザインもとにかくシンプル。デコデコした余計なものがなくて、サラッと書けるのでとても使いやすいです。ロック機能は絶対欲しかったので理想です。
欲を言えば、機種変更対応があれば……ワガママですけど😅

不満だった大きなバグがなくなったので評価上げて書き直しました。

### 5/5 — 使いやすい！

*2016-10-31, version 6.2.1*

他の日記アプリを使ってはやめて、を繰り返してましたが…
これは使いやすい！！ここ１週間毎日書いてます。書きやすくて見やすいのが良いですね。
メモもぽんぽんぽんって書けるのでちょこちょこ使ってます。
本当にオススメです♡
いつもありがとうございます！

強いて言えば、文字の色だったりもっとカラーが欲しいです。検討よろしくお願いします！

### 5/5 — すごくいいです¨̮♡

*2016-10-24, version 6.2.1*

使いやすくて、自分だけが見れる日記だから安心してかける。
ほかの人に見られたくない時はパスワードをかけてロックできるので安心安心( ´ｰ` )❤︎
SNSみたいにメモもできるし、自分だけの日記って感じがしてとってもいいです！いれてよかったです。

### 5/5 — いい👋

*2016-10-10, version 6.2.1*

忘れない様に、メモも出来るし、日記も気軽に書ける✍︎
いいと思う♡

### 5/5 — 使いやすい

*2016-10-04, version 6.2.1*

使いやすいし、シンプルで好き！

普段続かないのに続けられる手軽さ！

でも広告と画像貼り付ける容量増やすのに課金しないといけないー

でもこれからもいいアプリにしてくれるだろうと投資のつもりで(o´罒`o)

運営さん頑張ってー( ˶ˆ꒳ˆ˵ )

## Frequently asked questions about nikki

### What can I do with this diary app?

You can write secret diary entries, insert pictures into each article, and take notes in a chat format. It also functions as a schedule book for future dates and offers various fun stamps to enhance your entries.

### How secure is my diary?

The app offers robust security features, allowing you to lock it with a password. It also supports biometric authentication methods like Face ID and Touch ID for enhanced privacy and quick access.

### Can I customize the look of my diary?

Yes, you can change the timeline theme to suit your preferences. There are three types available: a Pinboard type emphasizing photos, a List type focusing on articles, and a Calendar type for practicality.

### Is this app free to use?

The app is free to download and use, but it offers in-app purchases. This means you can enjoy the core features for free, with optional purchases available for additional content or features.

### What are the main use cases for this app?

This app is ideal for personal journaling, keeping a private diary with multimedia, organizing thoughts and notes, and planning future events or schedules in a visually engaging way.

## Version history (last 5 releases)

### 26.1.1 — 2025-12-29

Bug fix

### 24.4.1 — 2024-04-16

Bug Fix

### 21.12.1 — 2021-12-07

Bug Fix

### 21.9.1 — 2021-08-26

Bug Fix

### 21.4.2 — 2021-04-12

Bug Fix

## Apps similar to nikki

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [A Diary - Record life & Mood](https://appshunter.io/ios/app/a-diary-record-life-and-mood/id1639822876) | 3.3 (3) | Free | Lifestyle |
| [My Nikki](https://appshunter.io/ios/app/my-nikki/id1040960062) | 4.7 (30) | Free | Lifestyle |
| [DrawerJournal - Private Diary](https://appshunter.io/ios/app/drawerjournal-private-diary/id1553585038) | 4.6 (73) | Free | Lifestyle |
| [Personal Diary (Journal) App](https://appshunter.io/ios/app/personal-diary-journal-app/id1052570257) | 4.4 (104) | Free | Lifestyle |
| [Super Simple Diary - Journal](https://appshunter.io/ios/app/super-simple-diary-journal/id1635770040) | 5.0 (7) | Free | Lifestyle |
| [Diary with Lock - iDiary](https://appshunter.io/ios/app/diary-with-lock-idiary/id1625609721) | 4.2 (18) | Free | Lifestyle |

## More apps by REVOLAB Inc.

- [ゆるくやせる！](https://appshunter.io/ios/app/id658227970)

All apps by REVOLAB Inc.: https://appshunter.io/developer/575787284

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-09.*