# ChiisanaDiary vs 理性くんと感情ちゃん

The clearest difference is in-app purchases: 理性くんと感情ちゃん at none against ChiisanaDiary's 2. ChiisanaDiary's advantage is ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. ChiisanaDiary sells 2 in-app purchases, starting at $1.99 per month. 理性くんと感情ちゃん asks for nothing beyond the download.

ChiisanaDiary ships an update fortnightly, 理性くんと感情ちゃん every 3 weeks. Both last shipped on September 8, 2026.

## The numbers

| Metric | ChiisanaDiary | 理性くんと感情ちゃん |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 75.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Monetization | — | Ad-supported |
| Size | 76 MB | 46 MB |
| Requires iOS | 16.6 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [RYOGO KAWASAKI](https://appshunter.io/developer/1642839814) | [Tomoya Seki](https://appshunter.io/developer/1832218107) |

## What reviewers say

### ChiisanaDiary

[App page](https://appshunter.io/ios/app/chiisanadiary/id6747301988)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Plan | $1.99 | per month |
| Annual Plan | $19.99 | per year |


### 理性くんと感情ちゃん

[App page](https://appshunter.io/ios/app/ai/id6755962338)

This app offers two AI characters, one logical and one emotional, to provide advice from different perspectives. Engage in natural conversations through a group chat interface and get unique insights from occasional surprise characters. It's designed to help users sort through their feelings and make life decisions.

**Highlights:** Dual AI perspectives (logical and emotional), Group chat interface, Mention feature for specific AI responses, Surprise character interactions, Personalized advice for life decisions, Self-understanding and new perspectives

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

**In-app purchases:** none


## Frequently asked questions

### Is ChiisanaDiary free?

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

### Is 理性くんと感情ちゃん free?

理性くんと感情ちゃん is free to download, with no in-app purchases.

### Do ChiisanaDiary or 理性くんと感情ちゃん have ads?

理性くんと感情ちゃん shows ads; ChiisanaDiary does not.

### Which is updated more often, ChiisanaDiary or 理性くんと感情ちゃん?

ChiisanaDiary ships an update fortnightly, and 理性くんと感情ちゃん every 3 weeks. Most recently, ChiisanaDiary was updated on September 8, 2026 and 理性くんと感情ちゃん 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.*