# Second Brain vs Chat AI

The clearest difference is ads: Second Brain at none against Chat AI's shown. Second Brain also leads on update cadence (every 4 weeks vs every 19 months) and ratings volume (61 vs 1). Chat AI's advantage is rating (5.0 vs 4.8) and device support (3 vs 1). On price, in-app purchases, monetization model and iOS requirement there is nothing between them.

Both are free to download. Second Brain sells 3 in-app purchases, starting at $5.99 per 7 days and Chat AI sells 4 in-app purchases, starting at $7.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Chat AI holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Second Brain has 61 ratings behind it against 1, so its average is the more settled of the two.

Second Brain ships an update every 4 weeks, Chat AI every 19 months. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Second Brain | Chat AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (61 ratings)](https://appshunter.io/ios/app/second-brain-ai-chat/id6446254904/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/chat-ai-chat-assistant-ai-plus/id6460979489/reviews)** |
| Number of ratings | **61** | 1 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 4 weeks** | Every 19 months |
| Monetization | Freemium | Free with in-app purchases |
| Size | 78 MB | 93 MB |
| Requires iOS | 16.6 | **15.5** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 17+ | 17+ |
| Developer | [Tairs Rzajevs](https://appshunter.io/developer/1576119083) | [Mansur Segmen](https://appshunter.io/developer/1702233080) |

## What reviewers say

### Second Brain

[App page](https://appshunter.io/ios/app/second-brain-ai-chat/id6446254904)

This AI chatbot uses GPT technology to generate creative content like stories and songs, answer questions, and provide entertainment. It offers a premium subscription for enhanced features and a free trial period.

**Highlights:** AI-powered writing assistance, Story and song generation, Question answering, Joke telling, GPT technology integration

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium for one Week | $5.99 | per 7 days |
| Premium for one Month | $9.99 | per month |
| Premium for one Year | $39.99 | per year |


### Chat AI

[App page](https://appshunter.io/ios/app/chat-ai-chat-assistant-ai-plus/id6460979489)

This AI-powered assistant leverages advanced models like ChatGPT and GPT-4 for intelligent conversations, text completion, and email writing. It offers a personalized and user-friendly experience for various needs on your mobile devices.

**Highlights:** AI-powered chat assistant, Powered by ChatGPT & GPT-4, Voice interaction, Email writing assistance, Intelligent conversational experience, Text completion

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Access | $7.99 | per 7 days |
| Unlimited Access | $29.99 | per year |
| Unlimited Access | $39.99 | per year |
| Unlimited Access | $49.99 | per year |


## Frequently asked questions

### Is Second Brain free?

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

### Is Chat AI free?

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

### Which has better reviews, Second Brain or Chat AI?

Chat AI is rated higher. Second Brain averages 4.8 out of 5 from 61 ratings, while Chat AI averages 5.0 from 1 ratings.

### Do Second Brain or Chat AI have ads?

Chat AI shows ads; Second Brain does not.

### Which is updated more often, Second Brain or Chat AI?

Second Brain ships an update every 4 weeks, and Chat AI every 19 months. Most recently, Second Brain was updated on October 24, 2026 and Chat AI on October 25, 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.*