# TruthTruth vs SecondBrain AI Assistant

The clearest difference is in-app purchases: TruthTruth at none against SecondBrain AI Assistant's 2. SecondBrain AI Assistant's advantage is update cadence (daily vs every 4 days). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. SecondBrain AI Assistant sells 2 in-app purchases, starting at $9.99 per month. TruthTruth asks for nothing beyond the download.

TruthTruth ships an update every 4 days, SecondBrain AI Assistant daily. The most recent releases landed on October 4, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | TruthTruth | SecondBrain AI Assistant |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 days | **Daily** |
| Size | 54 MB | 23 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [熠 杨](https://appshunter.io/developer/1896629285) | [BUILD TO CONNECT LTD](https://appshunter.io/developer/6778076361) |

## What reviewers say

### TruthTruth

[App page](https://appshunter.io/ios/app/truthtruth/id6762195166)

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

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is TruthTruth free?

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

### Is SecondBrain AI Assistant free?

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

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

Neither TruthTruth nor SecondBrain AI Assistant shows ads.

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

TruthTruth ships an update every 4 days, and SecondBrain AI Assistant daily. Most recently, TruthTruth was updated on October 4, 2026 and SecondBrain AI Assistant on October 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.*