# Social Tree vs Second AI Brain

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

Both are free to download. Social Tree sells 2 in-app purchases, starting at $3.99 per month. Second AI Brain asks for nothing beyond the download.

Social Tree ships an update monthly, Second AI Brain every 2 days. Both last shipped on October 31, 2026.

## The numbers

| Metric | Social Tree | Second AI Brain |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/social-tree-remember-everyone/id6763286044/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 days** |
| Monetization | Freemium | — |
| Size | 22 MB | 10 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Praneel Bhatia](https://appshunter.io/developer/1895247764) | [曜郡 刘](https://appshunter.io/developer/6799808062) |

## What reviewers say

### Social Tree

[App page](https://appshunter.io/ios/app/social-tree-remember-everyone/id6763286044)

Effortlessly remember people and conversation details with AI-powered voice notes. Find contacts by any remembered trait and get AI-generated prompts for your next interaction. Built for individuals with extensive networks.

**Highlights:** Fuzzy AI search for contacts, Voice-first note capture, AI-generated conversation starters, Smart, auto-organized profiles, Private, on-device storage, Network visualization

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SocialTree Pro | $3.99 | per month |
| SocialTree Pro | $29.99 | 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 Social Tree free?

Social Tree 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 Social Tree or Second AI Brain have ads?

Neither Social Tree nor Second AI Brain shows ads.

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

Social Tree ships an update monthly, and Second AI Brain every 2 days. Most recently, Social Tree was updated on October 31, 2026 and Second AI Brain on October 31, 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.*