# nikki vs Diary with Lock

The clearest difference is review sentiment: nikki at 98% against Diary with Lock's 0%. nikki also leads on rating (5.0 vs 4.3). Diary with Lock's advantage is ads (none vs shown) and ratings volume (20 vs 5). On price, update cadence, 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 Diary with Lock sells 1 in-app purchase, starting at $9.99 per year. Whichever you choose, the download price is not the number that matters.

nikki holds the better App Store score, 5.0 against 4.3. Both are backed by a comparable volume of ratings — 5 and 20 respectively. Written reviews point the same way: 98% of nikki's written reviews are positive against 0% of Diary with Lock's.

nikki ships an update every 2 months, Diary with Lock every 3 months. The most recent releases landed on June 9, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | nikki | Diary with Lock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/nikki-diary/id921470934/reviews)** | [4.3 (20 ratings)](https://appshunter.io/ios/app/diary-with-lock-idiary/id1625609721/reviews) |
| Number of ratings | 5 | **20** |
| Positive reviews | **98.1% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | Free with in-app purchases | Freemium |
| Size | 30 MB | 58 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [REVOLAB Inc.](https://appshunter.io/developer/575787284) | [Heyou Co., Ltd.](https://appshunter.io/developer/1480358223) |

## 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 |


### Diary with Lock

[App page](https://appshunter.io/ios/app/diary-with-lock-idiary/id1625609721)

Capture and cherish life's moments in a secure, beautifully designed digital journal. Add text, photos, and videos, track your mood and weather, and protect your entries with a passcode. Back up your memories to iCloud and export them as PDFs.

**Highlights:** Photo and text diary entries, Lock screen passcode protection, iCloud backup, Mood and weather tracking, Font customization, Intruder snapshots, PDF export

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| iDiary Pro | $9.99 | per year |


## Frequently asked questions

### Is nikki free?

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

### Is Diary with Lock free?

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

### Which has better reviews, nikki or Diary with Lock?

nikki is rated higher. nikki averages 5.0 out of 5 from 5 ratings, while Diary with Lock averages 4.3 from 20 ratings.

### Do nikki or Diary with Lock have ads?

nikki shows ads; Diary with Lock does not.

### Which is updated more often, nikki or Diary with Lock?

nikki ships an update every 2 months, and Diary with Lock every 3 months. Most recently, nikki was updated on June 9, 2026 and Diary with Lock on September 8, 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.*