# WriteGPT vs Second AI Brain

The clearest difference is in-app purchases: Second AI Brain at none against WriteGPT's 4. Second AI Brain also leads on ads (none vs shown) and update cadence (daily vs every 2 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. WriteGPT sells 4 in-app purchases, starting at $5.99 per month. Second AI Brain asks for nothing beyond the download.

WriteGPT ships an update every 2 months, Second AI Brain daily. The most recent releases landed on October 24, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | WriteGPT | Second AI Brain |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (19 ratings)](https://appshunter.io/ios/app/writegpt/id6447081746/reviews)** | — |
| Number of ratings | **19** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Daily** |
| Monetization | Free with in-app purchases | — |
| Size | 40 MB | 10 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [ZQ Labs, Inc.](https://appshunter.io/developer/1619568628) | [曜郡 刘](https://appshunter.io/developer/6799808062) |

## What reviewers say

### WriteGPT

[App page](https://appshunter.io/ios/app/writegpt/id6447081746)

This AI writing assistant leverages advanced models like GPT-5 and Gemini Pro to help users create, edit, and polish various content types in seconds. It offers over 50 premium tools for writing, rewriting, proofreading, and translation, enhancing productivity and content quality.

**Highlights:** 50+ premium AI writing tools, One-click content creation for over 100 types, Supports GPT-5, Gemini Pro, Claude 4.5, Grok, Richer content inputs (voice, files, images), Inline AI editing, Grammar and spelling checker, Content summarization and explanation

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| WriteGPT AI Plus Month | $5.99 | per month |
| WriteGPT AI Premium Month | $14.99 | per month |
| WriteGPT AI Plus Year | $43.49 | per year |
| WriteGPT AI Premium Year | $89.99 | per year |


### Second AI Brain

[App page](https://appshunter.io/ios/app/second-ai-brain/id6803160108)

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

**In-app purchases:** none


## Frequently asked questions

### Is WriteGPT free?

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

### Is Second AI Brain free?

Second AI Brain is free to download, with no in-app purchases.

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

WriteGPT shows ads; Second AI Brain does not.

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

WriteGPT ships an update every 2 months, and Second AI Brain daily. Most recently, WriteGPT was updated on October 24, 2026 and Second AI Brain on October 7, 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.*