Before you can begin using BioForce HRV you must create an account here: http://my.bioforcehrv.com/accounts/signup/.
You must click the activation link that is sent to your email address within 48 hours or you will have to repeat this process.
Check the junk/spam folder if you don't see the email and link in you inbox as they sometimes end up there.
Next, download the app to your device, using the information from the "create and account" page.
You are now ready to begin using BioForce HRV.