About

Medical disclaimer

Crickles is in no sense a medical tool and cannot diagnose your cardiac health. Also, there is no generally accepted agreement on how best to quantify cardiac stress through exercise; Crickles aims to come up with a sensible, high-quality measure in the absence of established science.

On the other hand, Mark, the Crickles cardiologist, does respond to questions from the Crickles community as best he can.

Privacy policy

Crickles will never disclose any identifying information about you to a third party. “Identifying information” includes your name, your date of birth, activity location data or the name you’ve given to any activity. We do not seek to identify your IP address and we do not, nor will we ever, make money from selling your data.

We do use your data to explore patterns of health, fitness and exercise and to try to make Crickles as useful as possible. Data published in any research or online articles will also be completely anonymised

Infrastructure

The Crickles Navigator runs on Amazon Web Services and Cloudflare cloud infrastructure. Since the website and Navigator are free to access yet incur cost, there is less redundancy (and hence resilience) than you might expect in an app that carries a monthly usage charge. The up-time over many years consistently stands at over 99% but it can, rarely, falter under volume surges or on account of sporadic technical issues. If you see anything that doesn’t look right please do get in touch to let us know, while being thankful for the fact that Crickles is free and usually reliable!