# AI Chat vs Second Brain

The clearest difference is ads: Second Brain at none against AI Chat's shown. AI Chat's advantage is update cadence (weekly vs every 4 weeks). On price, rating, ratings volume and in-app purchases there is nothing between them.

Both are free to download. AI Chat sells 8 in-app purchases, starting at $5.99 per 7 days and Second Brain sells 3 in-app purchases, starting at $5.99 per 7 days. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.7 for AI Chat against 4.8 for Second Brain. Both are backed by a comparable volume of ratings — 126 and 61 respectively.

AI Chat ships an update weekly, Second Brain every 4 weeks. Both last shipped on November 3, 2026.

## The numbers

| Metric | AI Chat | Second Brain |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (126 ratings)](https://appshunter.io/ios/app/ai-chat-nera-smart-assistant/id1667468949/reviews) | **[4.8 (61 ratings)](https://appshunter.io/ios/app/second-brain-ai-chat/id6446254904/reviews)** |
| Number of ratings | **126** | 61 |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Weekly** | Every 4 weeks |
| Monetization | Free with in-app purchases | Freemium |
| Size | 40 MB | 78 MB |
| Requires iOS | **15.4** | 16.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 12+ | 17+ |
| Developer | [AirShape](https://appshunter.io/developer/1638120760) | [Tairs Rzajevs](https://appshunter.io/developer/1576119083) |

## What reviewers say

### AI Chat

[App page](https://appshunter.io/ios/app/ai-chat-nera-smart-assistant/id1667468949)

This AI-powered chatbot provides accurate and comprehensive answers to complex questions. It clarifies details, helps with writing, and can solve math problems, acting as a creative assistant for both personal and professional use. Enjoy an ad-free, intuitive experience for quick information retrieval.

**Highlights:** AI-powered question answering, Writing and text improvement, Math problem solving, Organized and comprehensive responses, Ad-free experience, Search history log

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Nera AI Unlimited Access | $5.99 | per 7 days |
| Unlimited Monthly Subscription | $19.99 | per month |
| Unlimited AI Chat | $29.99 | per month |
| Nera AI Unlimited Access | $44.99 | per year |
| Unlimited Annual Subscription | $89.99 | per year |
| Unlimited AI Chat | $129.99 | per year |
| 20 AI Chat Messages | $9.99 | one-time |
| 100 AI Chat Messages | $19.99 | one-time |


### 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 |


## Frequently asked questions

### Is AI Chat free?

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

### Is Second Brain free?

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

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

Second Brain is rated higher. AI Chat averages 4.7 out of 5 from 126 ratings, while Second Brain averages 4.8 from 61 ratings.

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

AI Chat shows ads; Second Brain does not.

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

AI Chat ships an update weekly, and Second Brain every 4 weeks. Most recently, AI Chat was updated on November 3, 2026 and Second Brain on November 3, 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.*