# DEVONthink To Go 4 vs SecondBrain Pro

The clearest difference is update cadence: DEVONthink To Go 4 at every 3 weeks against SecondBrain Pro's every 2 months. SecondBrain Pro's advantage is iOS requirement (17.0 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. DEVONthink To Go 4 sells 2 in-app purchases, starting at $2.99 per month and SecondBrain Pro sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

DEVONthink To Go 4 ships an update every 3 weeks, SecondBrain Pro every 2 months. The most recent releases landed on October 30, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | DEVONthink To Go 4 | SecondBrain Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (257 ratings)](https://appshunter.io/ios/app/devonthink-to-go-4/id6532619226/reviews)** | — |
| Number of ratings | **257** | — |
| Positive reviews | 44.8% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | — |
| Size | 193 MB | 10 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [DEVONtechnologies, LLC](https://appshunter.io/developer/395722473) | [Heinrich Krupp](https://appshunter.io/developer/1866842398) |

## What reviewers say

### DEVONthink To Go 4

[App page](https://appshunter.io/ios/app/devonthink-to-go-4/id6532619226)

Manage your entire knowledge library on your iPad and iPhone. Organize, edit, and annotate documents, notes, and more. Leverage generative AI for summaries, content creation, and advanced search. Syncs privately and securely across devices.

**Highlights:** Document organization and management, AI-powered summaries and content creation, PDF annotation and editing, On-device OCR for searchable documents, Cross-device secure synchronization, Custom metadata and tagging, Shortcuts automation

**Features:** Family Sharing, Siri integration, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $2.99 | per month |
| Yearly | $19.99 | per year |


### SecondBrain Pro

[App page](https://appshunter.io/ios/app/secondbrain-pro/id6757423935)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Standard | $7.99 | one-time |
| SecondBrain PREMIUM | $17.99 | one-time |


## Frequently asked questions

### Is DEVONthink To Go 4 free?

DEVONthink To Go 4 is free to download, with in-app purchases available.

### Is SecondBrain Pro free?

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

### Do DEVONthink To Go 4 or SecondBrain Pro have ads?

Neither DEVONthink To Go 4 nor SecondBrain Pro shows ads.

### Which is updated more often, DEVONthink To Go 4 or SecondBrain Pro?

DEVONthink To Go 4 ships an update every 3 weeks, and SecondBrain Pro every 2 months. Most recently, DEVONthink To Go 4 was updated on October 30, 2026 and SecondBrain Pro on October 24, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*