# Second Brain SB vs Opal

The clearest difference is device support: Opal at 2 against Second Brain SB's —. Second Brain SB's advantage is iOS requirement (11.0 vs 18.1). On price and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Second Brain SB | Opal |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (37 ratings)](https://appshunter.io/ios/app/opal-guided-journal-and-diary/id6745115075/reviews)** |
| Number of ratings | — | **37** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | — | No |
| Update frequency | — | Every 8 days |
| Monetization | — | Free |
| Size | 26 MB | 336 MB |
| Requires iOS | **11.0** | 18.1 |
| Devices | — | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Gianlucca Vick](https://appshunter.io/developer/1691417067) | [Darby Tarlow](https://appshunter.io/developer/1810836939) |

## What reviewers say

### Second Brain SB

[App page](https://appshunter.io/ios/app/second-brain-sb/id6449985684)

**In-app purchases:** none


### Opal

[App page](https://appshunter.io/ios/app/opal-guided-journal-and-diary/id6745115075)

This private journaling app uses AI to help you understand your thoughts and emotions. It offers guided prompts, ambient soundscapes, and the ability to write, speak, or add photos to your entries. AI tools analyze your writing to reveal patterns and insights, all while prioritizing your privacy with on-device storage.

**Highlights:** AI-powered pattern analysis, Guided journaling journeys, Voice and image entry support, Multiple journal organization, On-device privacy controls, Prompt-based or blank page entries

**In-app purchases:** none


## Frequently asked questions

### Is Second Brain SB free?

Second Brain SB is free to download, with no in-app purchases.

### Is Opal free?

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

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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.*