Cold-water immersion has been studied in labs and is known to affect arousal, stress physiology, and mood. But there’s still a lot we don’t know. This app aims to help find out, including:
Track reaction time, attention stability, processing speed, and mood.
Discover how plunge frequency, timing, sleep, and caffeine influence you.
Compare your results anonymously with the community averages.
Reaction time and attention stability
Processing speed and executive control
Mood and stress check-in
Context: sleep, caffeine, and timing
The dataset belongs to the community. Participation strengthens both your personal insights and the group evidence.
Dr Andy Woods is a psychologist at Royal Holloway, University of London, specialising in perception and online cognitive research methodology. His published work includes a peer-reviewed tutorial on running perception studies over the internet, and he has designed and validated cognitive tasks across dozens of large-scale online studies.
This project applies that same rigorous, open methodology to cold-water immersion — a subject with a passionate community (which includes Andy!) but still relatively sparse controlled evidence.
Please help cover the costs of this app, including servers, storage, and ongoing development. With your support, I’d be able to bring in researchers and developers to add new features and further advance the science.
Every plunge you log and test you do improves your personal dashboard and strengthens the community evidence.
Adjust display settings. Preferences are saved for your next visit.
