# SecondBrain AI Assistant vs Axiom

The clearest difference is update cadence: SecondBrain AI Assistant at daily against Axiom's weekly. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. SecondBrain AI Assistant sells 2 in-app purchases, starting at $9.99 per month and Axiom sells 4 in-app purchases, starting at $19.99 per month. Whichever you choose, the download price is not the number that matters.

SecondBrain AI Assistant ships an update daily, Axiom weekly. The most recent releases landed on October 17, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | SecondBrain AI Assistant | Axiom |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/axiom-your-ai-second-brain/id6778582936/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Daily** | Weekly |
| Monetization | — | Freemium |
| Size | 23 MB | 82 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [BUILD TO CONNECT LTD](https://appshunter.io/developer/6778076361) | [Mithilkumar Shashikant Patel](https://appshunter.io/developer/6778583028) |

## What reviewers say

### SecondBrain AI Assistant

[App page](https://appshunter.io/ios/app/secondbrain-ai-assistant/id6778076359)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Second Brain Pro Monthly | $9.99 | per month |
| Second Brain Pro Annual | $69.99 | per year |


### Axiom

[App page](https://appshunter.io/ios/app/axiom-your-ai-second-brain/id6778582936)

Organize thoughts, media, and archives into a unified cognitive workspace. This AI-powered tool transforms your inputs into structured, searchable insights and creates visual memory reels with AI narration. It offers secure, private data management with local biometric architecture and automated data purging.

**Highlights:** Instant knowledge ingestion (scan, voice, document, paste, AI generation), Cinematic memory reels with AI voice-over narration, Interactive vault chat for data summarization and analysis, Chronos timeline and knowledge graph visualization, Local biometric security and data privacy, Automated data purge option

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Axiom Creation Engine Monthly | $19.99 | per month |
| Axiom Infinite Brain Monthly | $49.99 | per month |
| Axiom Creation Engine Annual | $200.00 | per year |
| Axiom Infinite Brain Annual | $450.00 | per year |


## Frequently asked questions

### Is SecondBrain AI Assistant free?

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

### Is Axiom free?

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

### Do SecondBrain AI Assistant or Axiom have ads?

Neither SecondBrain AI Assistant nor Axiom shows ads.

### Which is updated more often, SecondBrain AI Assistant or Axiom?

SecondBrain AI Assistant ships an update daily, and Axiom weekly. Most recently, SecondBrain AI Assistant was updated on October 17, 2026 and Axiom on October 18, 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.*