# Interactive Brain Activation for fMRI Data vs Skillkeep

The clearest difference is update cadence: Interactive Brain Activation for fMRI Data at every 2 days against Skillkeep's every 3 weeks. Interactive Brain Activation for fMRI Data also leads on iOS requirement (9.1 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

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

Interactive Brain Activation for fMRI Data ships an update every 2 days, Skillkeep every 3 weeks. The most recent releases landed on September 28, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Interactive Brain Activation for fMRI Data | Skillkeep |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 3 weeks |
| Size | 86 MB | 303 MB |
| Requires iOS | **9.1** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [King Abdullah University of Science and Technology](https://appshunter.io/developer/514099091) | [Bitsational](https://appshunter.io/developer/1771805404) |

## What reviewers say

### Interactive Brain Activation for fMRI Data

[App page](https://appshunter.io/ios/app/interactive-brain-activation-for-fmri-data/id1114700705)

**Features:** macOS Compatibility

**In-app purchases:** none


### Skillkeep

[App page](https://appshunter.io/ios/app/skillkeep/id6736385259)

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

**In-app purchases:** none


## Frequently asked questions

### Is Interactive Brain Activation for fMRI Data free?

Interactive Brain Activation for fMRI Data is free to download, with no in-app purchases.

### Is Skillkeep free?

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

### Do Interactive Brain Activation for fMRI Data or Skillkeep have ads?

Neither Interactive Brain Activation for fMRI Data nor Skillkeep shows ads.

### Which is updated more often, Interactive Brain Activation for fMRI Data or Skillkeep?

Interactive Brain Activation for fMRI Data ships an update every 2 days, and Skillkeep every 3 weeks. Most recently, Interactive Brain Activation for fMRI Data was updated on September 28, 2026 and Skillkeep on October 10, 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.*