# Mentalab Explore vs ChatBrain

The clearest difference is in-app purchases: Mentalab Explore at none against ChatBrain's 4. Mentalab Explore also leads on ads (none vs shown) and device support (3 vs 1). ChatBrain's advantage is update cadence (every 2 days vs every 3 months). On price there is nothing between them.

Both are free to download. ChatBrain sells 4 in-app purchases, starting at $3.99 per 7 days. Mentalab Explore asks for nothing beyond the download.

Mentalab Explore ships an update every 3 months, ChatBrain every 2 days. The most recent releases landed on September 20, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Mentalab Explore | ChatBrain |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.9 (11 ratings)](https://appshunter.io/ios/app/chatbrain-ai-chat-chatbot/id6741812112/reviews)** |
| Number of ratings | — | **11** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Every 2 days** |
| Monetization | — | Free with in-app purchases |
| Size | 25 MB | 65 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Mentalab GmbH](https://appshunter.io/developer/1762831302) | [Gulf Bay Ventures LLC](https://appshunter.io/developer/1795738256) |

## What reviewers say

### Mentalab Explore

[App page](https://appshunter.io/ios/app/mentalab-explore/id6636486425)

**In-app purchases:** none


### ChatBrain

[App page](https://appshunter.io/ios/app/chatbrain-ai-chat-chatbot/id6741812112)

This AI assistant leverages advanced models to provide intelligent conversations, assist with writing and coding, generate images from descriptions, and simplify research. It offers a no-login experience for instant use, making it a versatile tool for creativity and productivity.

**Highlights:** Intelligent conversations and assistance, AI writing and editing tools, AI image generation, Coding and debugging help, Research and learning simplification, No login required

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Unlimited | $3.99 | per 7 days |
| Annual Premium | $24.99 | per year |
| ChatBrain Token Bundle | $5.99 | one-time |
| Lifetime Unlimited | $69.99 | one-time |


## Frequently asked questions

### Is Mentalab Explore free?

Mentalab Explore is free to download, with no in-app purchases.

### Is ChatBrain free?

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

### Do Mentalab Explore or ChatBrain have ads?

ChatBrain shows ads; Mentalab Explore does not.

### Which is updated more often, Mentalab Explore or ChatBrain?

Mentalab Explore ships an update every 3 months, and ChatBrain every 2 days. Most recently, Mentalab Explore was updated on September 20, 2026 and ChatBrain 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.*