# nikki vs OneDay日記

The clearest difference is in-app purchases: OneDay日記 at none against nikki's 2. OneDay日記 also leads on ads (none vs shown). nikki's advantage is review sentiment (98% vs 67%) and update cadence (every 2 months vs every 7 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. nikki sells 2 one-off in-app purchases. OneDay日記 asks for nothing beyond the download.

nikki ships an update every 2 months, OneDay日記 every 7 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | nikki | OneDay日記 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/nikki-diary/id921470934/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | **98.1% of reviews** | 66.7% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 2 months** | Every 7 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 30 MB | 42 MB |
| Requires iOS | 15.6 | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [REVOLAB Inc.](https://appshunter.io/developer/575787284) | [Hiroki Sato](https://appshunter.io/developer/1514602166) |

## 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 |


### OneDay日記

[App page](https://appshunter.io/ios/app/oneday/id1524208763)

This app allows users to create and share personal diaries with others. You can choose to keep your entries private or make them visible to a community, with view counts displayed. It offers customization for your profile and is completely free to use without ads.

**Highlights:** Shared diary functionality, View counts for entries, Private journaling option, Profile customization (name, icon), Backup feature available, Completely free to use

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is nikki free?

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

### Is OneDay日記 free?

OneDay日記 is free to download, with no in-app purchases.

### Do nikki or OneDay日記 have ads?

nikki shows ads; OneDay日記 does not.

### Which is updated more often, nikki or OneDay日記?

nikki ships an update every 2 months, and OneDay日記 every 7 months. Most recently, nikki was updated on November 1, 2026 and OneDay日記 on November 3, 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.*