1. The service
Prefrontal Gym provides short browser-based cognitive exercises (including the Schulte grid, ball tracking, Stroop, N-back and backward digit span), related practice guides and explainer pages, and optional features such as progress backup (together, "the Service"). The core exercises are free and can be used without registering. We may add, change or discontinue features as the project evolves, and will try to explain significant changes on the site in advance.
2. Accounts and progress
You can use the exercises without registering, and by default your progress is stored in your current browser on your device. If you choose to use an account or device sign-in to back up progress, please keep your sign-in details safe; you are responsible for activity under your account. Clearing browser data may delete progress stored only on your device, and we cannot recover it.
3. Acceptable use
When using the Service, you agree not to:
- interfere with exercises, leaderboards or leagues using scripts, cheats or other means, or fake results;
- attempt unauthorised access to our servers, databases or other users' data;
- attack, scan or flood the Service with requests in ways that could disrupt or overload it;
- use the Service for any activity that breaks applicable laws or regulations;
- deliberately click ads on the site, or encourage or ask others to click them.
If we find behaviour that breaks these rules, we may limit or end the related access and remove abnormal data.
4. Intellectual property
Unless stated otherwise, the text, exercise design, interface, the Spark mascot, icons and code on this site belong to the Prefrontal Gym team. You may browse and use the Service for personal, non-commercial purposes, and you are welcome to share pages and challenge results by link. Please do not copy or republish whole pieces of content or use them commercially without permission.
5. Ads and third-party services
To fund the project, some pages show ads provided by Google AdSense. Ads appear only on content pages and between-round results pages, never inside an exercise while you play. Ads and the cookies they use are provided by third parties; see our privacy policy and Google's policies for how that data is handled. The site may link to third-party websites, and we are not responsible for their content or practices.
6. Disclaimer
The Service is provided "as is". We work to keep the site stable and the content accurate, but we do not guarantee that the Service will be uninterrupted or error-free, or that the exercises will produce any particular result. Results only reflect your performance on specific tasks. Please practise in moderation, and stop and rest if you feel unwell.
7. Limitation of liability
To the extent permitted by applicable law, the Prefrontal Gym team is not liable for any indirect, incidental or consequential loss (including but not limited to loss of data) arising from your use of, or inability to use, the Service.
8. Minors
Minors should use the Service under the guidance of a parent or guardian and keep screen time reasonable.
9. Changes to these terms
We may update these terms from time to time. Updated terms will be posted on this page with a new effective date at the top. For significant changes we will try to show a notice on the site. Continuing to use the Service after an update means you accept the updated terms.
10. Contact
If you have questions about these terms, email gishchan32@gmail.com or visit the contact page.