# Oddball — The P300 Brain Game

> The P300 Brain Game (iPhone/iPad app by Olave Krigolson.)

- Source: https://appshunter.io/ios/app/oddball/id6820829325 (this page in markdown: same URL + `.md`)
- Developer: [Olave Krigolson](https://appshunter.io/developer/1476755479)
- Category: Education
- Price: $19.99
- Age rating: 4+
- Requires: iOS 18.0 · 10 MB
- Languages: American English
- Released: 2026-11-05
- Data updated: 2026-11-08

## What is Oddball?

Oddball turns one of neuroscience's best-known experiments into a short game you play while wearing a Muse EEG headband.

Watch or listen for the rare "oddball" among frequent standard stimuli. Each time an oddball appears, your brain produces a P300: a positive brainwave about a third of a second later that reflects attention and the updating of what you expect. Oddball records your EEG, averages your responses and scores your P300 for you.

THREE WAYS TO PLAY
• Visual, Standard: a blue or red circle at the centre of the screen.
• Visual, Jump: circles appear anywhere on the screen; tap each red circle, right on it.
• Auditory: low and high tones through the phone speaker or wired headphones.

YOUR RESULTS
• P300 amplitude (µV) and latency (ms), scored the same way every session.
• Your average waveforms for standards, oddballs and their difference.
• Re-mark the peak yourself with a slider if you disagree with the automatic score.
• Accuracy when you respond: hits, misses, false taps and reaction time.

MADE FOR RESEARCH
• Game Speed sets how quickly stimuli come, from one a second to one every three seconds.
• Every session saves the raw EEG with event markers, a trial-by-trial log and a results file (CSV and JSON), ready for MATLAB, Python or R.
• Export all your results to one CSV, or open the session folders in the Files app.
• If the headband disconnects, the game pauses and reconnects on its own.
• The scoring method is versioned and written into every results file.

PRIVATE
Your recordings never leave your device unless you share them. No account, no tracking.

REQUIREMENTS
A Muse EEG headband: Muse 2, Muse S or Muse S Athena, connected over Bluetooth.

Oddball is a research and education tool. It is not a medical device and does not diagnose, treat or monitor any condition.

Built by Olave Krigolson, a neuroscientist who studies the P300.

## Is Oddball safe?

Not enough ratings yet to assess Oddball.

## Is Oddball legit?

Oddball appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Oddball is 75 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 1 release)

### 1.0 — 2026-11-05

No release notes.

## More apps by Olave Krigolson

- [bodyQuiz](https://appshunter.io/ios/app/bodyquiz/id1476755480)
- [EEG Recorder](https://appshunter.io/ios/app/eeg-recorder/id6746664124)
- [Visual Oddball](https://appshunter.io/ios/app/visual-oddball/id6756637272)

All apps by Olave Krigolson: https://appshunter.io/developer/1476755479

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-11-08.*