# Visual Oddball — A visual reaction time task

> A visual reaction time task (iPhone/iPad app by Olave Krigolson.)

- Source: https://appshunter.io/ios/app/visual-oddball/id6756637272 (this page in markdown: same URL + `.md`)
- Developer: [Olave Krigolson](https://appshunter.io/developer/1476755479)
- Category: Education
- Price: $4.99
- Age rating: 4+
- Requires: iOS 26.2 · 2 MB
- Languages: American English
- Released: 2025-12-18
- Data updated: 2026-07-26
- User reviews in markdown: https://appshunter.io/ios/app/visual-oddball/id6756637272/reviews.md

## What is Visual Oddball?

Visual Oddball is a simple, interactive iOS app that demonstrates visual attention and reaction time using a classic target-detection task.

Users respond to a designated target color while ignoring non-target stimuli. Circles appear briefly on screen with variable timing, encouraging focused attention and rapid responses. At the end of each session, the app provides clear performance summaries and allows optional data export for personal review.

Visual Oddball is designed for educational and demonstration purposes, making it useful for students, instructors, and anyone interested in how attention and response timing work in a simple, hands-on way.

Key Features

Adjustable number of trials and blocks
Configurable target probability
Brief stimulus presentation with variable timing
Reaction time measurement
Summary accuracy and response metrics
Optional CSV export for offline viewing
Visual Oddball runs entirely on-device and does not require an internet connection.

Important Notes

Visual Oddball is not a diagnostic or clinical tool.
The app does not collect personal data or require an account.
All interaction and data remain local to the device unless the user chooses to export results.


## Version history (last 1 release)

### 1.0 — 2025-12-18

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)

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

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*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 2026-07-26.*