If you purchased a Stryd Membership through the web then you can update your billing or cancel your Stryd Membership in PowerCenter. To cancel your Stryd Membership follow these steps:
1. Log in to your PowerCenter account at stryd.com/powercenter/
2. Tap the settings icon in the bottom left-hand corner for your PowerCenter
3. Then, tap on 'Cancel Membership'
If you're looking for how to cancel a membership that was purchased in the Stryd Mobile App visit this link