# 理性くんと感情ちゃん vs チャット日記

The clearest difference is ads: チャット日記 at none against 理性くんと感情ちゃん's shown. 理性くんと感情ちゃん's advantage is update cadence (every 3 weeks vs every 3 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

理性くんと感情ちゃん ships an update every 3 weeks, チャット日記 every 3 months. The most recent releases landed on October 10, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | 理性くんと感情ちゃん | チャット日記 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 3 weeks** | Every 3 months |
| Monetization | Ad-supported | — |
| Size | 46 MB | 30 MB |
| Requires iOS | **15.1** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Tomoya Seki](https://appshunter.io/developer/1832218107) | [Yuuki Nishimura](https://appshunter.io/developer/6776836664) |

## What reviewers say

### 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


### チャット日記

[App page](https://appshunter.io/ios/app/id6790073549)

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

**In-app purchases:** none


## Frequently asked questions

### 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.

### Is チャット日記 free?

チャット日記 is free to download, with no in-app purchases.

### Do 理性くんと感情ちゃん or チャット日記 have ads?

理性くんと感情ちゃん shows ads; チャット日記 does not.

### Which is updated more often, 理性くんと感情ちゃん or チャット日記?

理性くんと感情ちゃん ships an update every 3 weeks, and チャット日記 every 3 months. Most recently, 理性くんと感情ちゃん was updated on October 10, 2026 and チャット日記 on October 24, 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.*