# SecondBrain Pro vs Fields

The clearest difference is iOS requirement: Fields at 15.1 against SecondBrain Pro's 17.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. SecondBrain Pro sells 2 one-off in-app purchases and Fields sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

SecondBrain Pro ships an update every 2 months, Fields every 5 weeks. Both last shipped on November 5, 2026.

## The numbers

| Metric | SecondBrain Pro | Fields |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Size | 10 MB | 44 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Heinrich Krupp](https://appshunter.io/developer/1866842398) | [Gaurav Rangnekar](https://appshunter.io/developer/1895760720) |

## What reviewers say

### 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 |


### Fields

[App page](https://appshunter.io/ios/app/fields-secure-notes-and-vault/id6764572947)

**Features:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Fields Pro Lifetime | $4.99 | one-time |


## Frequently asked questions

### Is SecondBrain Pro free?

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

### Is Fields free?

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

### Do SecondBrain Pro or Fields have ads?

Neither SecondBrain Pro nor Fields shows ads.

### Which is updated more often, SecondBrain Pro or Fields?

SecondBrain Pro ships an update every 2 months, and Fields every 5 weeks. Most recently, SecondBrain Pro was updated on November 5, 2026 and Fields on November 5, 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.*