# First diary, Theme Diary vs AI絵日記

The clearest difference is ads: AI絵日記 at none against First diary, Theme Diary's shown. First diary, Theme Diary's advantage is device support (3 vs 1). On price, update cadence, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. First diary, Theme Diary sells 7 in-app purchases, starting at $0.99 per 2 months and AI絵日記 sells 3 in-app purchases, starting at $0.49 per month. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 2, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | First diary, Theme Diary | AI絵日記 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 131 MB | 20 MB |
| Requires iOS | **17.0** | 18.2 |
| Devices | **iPhone, iPad, Mac** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [G-SOFT](https://appshunter.io/developer/368394644) | [Koudai Kudou](https://appshunter.io/developer/1744671690) |

## What reviewers say

### First diary, Theme Diary

[App page](https://appshunter.io/ios/app/first-diary-theme-diary/id6483616889)

This app helps you journal your daily experiences with themes, emotions, and media. Record events with photos, videos, and location, and organize them privately. Premium features offer unlimited entries and media.

**Highlights:** Themed event recording, Emotion and level tracking, Add photos and videos, Location information, Secret themes and events, Passcode and biometric protection, iCloud sync

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Show weather | $0.99 | per 2 months |
| Hide ads | $0.99 | per month |
| Number of images | $1.99 | one-time |
| Character limit | $1.99 | one-time |
| Show weather | $3.99 | one-time |
| Hide ads (Unlimited) | $9.99 | one-time |
| Unlock passcode | $19.99 | one-time |


### AI絵日記

[App page](https://appshunter.io/ios/app/ai/id6748383978)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| フルバージョンへのアップデート | $0.49 | per month |
| Pro版へのアップグレード | $0.99 | one-time |
| Pro版へのアップグレード | $2.99 | one-time |


## Frequently asked questions

### Is First diary, Theme Diary free?

First diary, Theme Diary is free to download, with in-app purchases available.

### Is AI絵日記 free?

AI絵日記 is free to download, with in-app purchases available.

### Do First diary, Theme Diary or AI絵日記 have ads?

First diary, Theme Diary shows ads; AI絵日記 does not.

### Which is updated more often, First diary, Theme Diary or AI絵日記?

First diary, Theme Diary ships an update every 3 weeks, and AI絵日記 every 3 weeks. Most recently, First diary, Theme Diary was updated on October 2, 2026 and AI絵日記 on September 17, 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.*