# AI Diary vs OneDay日記

The clearest difference is ads: OneDay日記 at none against AI Diary's shown. OneDay日記 also leads on review sentiment (67% vs 33%) and monetization model (free vs ad-supported). AI Diary's advantage is update cadence (fortnightly vs every 7 months) and iOS requirement (12.0 vs 15.6). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

AI Diary ships an update fortnightly, OneDay日記 every 7 months. The most recent releases landed on October 22, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | AI Diary | OneDay日記 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 33.3% of reviews | **66.7% of reviews** |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Fortnightly** | Every 7 months |
| Monetization | Ad-supported | **Free** |
| Size | 27 MB | 42 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [kazuhiro aonuma](https://appshunter.io/developer/839973346) | [Hiroki Sato](https://appshunter.io/developer/1514602166) |

## What reviewers say

### AI Diary

[App page](https://appshunter.io/ios/app/ai-diary/id1493487805)

This simple diary app allows you to automatically analyze your written entries to track your moods. You can also manually input daily scores and easily edit or delete past entries. A search function helps you find specific memories.

**Highlights:** Automatic mood analysis, Manual daily score input, Easy diary editing, Swipe to delete entries, Search past diaries, Simple and intuitive interface

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

**In-app purchases:** none


### 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 AI Diary free?

AI Diary is free to download, with no in-app purchases.

### Is OneDay日記 free?

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

### Do AI Diary or OneDay日記 have ads?

AI Diary shows ads; OneDay日記 does not.

### Which is updated more often, AI Diary or OneDay日記?

AI Diary ships an update fortnightly, and OneDay日記 every 7 months. Most recently, AI Diary was updated on October 22, 2026 and OneDay日記 on October 27, 2026.

---

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