# nikki vs おとなの日記帳

The clearest difference is rating: nikki at 5.0 against おとなの日記帳's 4.6. nikki also leads on review sentiment (98% vs 85%) and iOS requirement (15.6 vs 17). おとなの日記帳's advantage is update cadence (monthly vs every 2 months) and ratings volume (21 vs 5). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. nikki sells 2 one-off in-app purchases and おとなの日記帳 sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

nikki holds the better App Store score, 5.0 against 4.6. Both are backed by a comparable volume of ratings — 5 and 21 respectively. Written reviews point the same way: 98% of nikki's written reviews are positive against 85% of おとなの日記帳's.

nikki ships an update every 2 months, おとなの日記帳 monthly. The most recent releases landed on June 9, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | nikki | おとなの日記帳 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/nikki-diary/id921470934/reviews)** | [4.6 (21 ratings)](https://appshunter.io/ios/app/sns/id1447462643/reviews) |
| Number of ratings | 5 | **21** |
| Positive reviews | **98.1% of reviews** | 85.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 2 months | **Monthly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 30 MB | 32 MB |
| Requires iOS | **15.6** | 17 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [REVOLAB Inc.](https://appshunter.io/developer/575787284) | [Masaki Hirano](https://appshunter.io/developer/870094068) |

## What reviewers say

### nikki

[App page](https://appshunter.io/ios/app/nikki-diary/id921470934)

This app allows you to keep a private diary with rich media. You can add photos, take notes in a chat format, and use it as a planner. Security features include password and biometric locks, with customizable themes to personalize your journaling experience.

**Highlights:** 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)

**Features:** macOS Compatibility

**In-app purchases (2)**

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


### おとなの日記帳

[App page](https://appshunter.io/ios/app/sns/id1447462643)

A simple and stylish diary app that allows you to attach unlimited photos. Easily write long entries with a convenient keyboard and attach multiple photos at once. Secure your memories with a passcode lock.

**Highlights:** Unlimited photo attachments, Batch photo selection, Camera integration, Long text entry support, Multiple entries per day, Passcode lock

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 広告非表示機能 | $2.99 | one-time |
| バックアップ復元機能の開放 | $2.99 | one-time |


## Frequently asked questions

### Is nikki free?

nikki is free to download, with in-app purchases available.

### Is おとなの日記帳 free?

おとなの日記帳 is free to download, with in-app purchases available.

### Which has better reviews, nikki or おとなの日記帳?

nikki is rated higher. nikki averages 5.0 out of 5 from 5 ratings, while おとなの日記帳 averages 4.6 from 21 ratings.

### Do nikki or おとなの日記帳 have ads?

Both nikki and おとなの日記帳 show ads.

### Which is updated more often, nikki or おとなの日記帳?

nikki ships an update every 2 months, and おとなの日記帳 monthly. Most recently, nikki was updated on June 9, 2026 and おとなの日記帳 on September 19, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*