You can permanently delete your account & data in Cycles at any time. To delete your account:
- Open the Me section, and tap settings in the top right
- Tap 'Account'
- Tap the '...' icon in the top right corner
- Select the 'Delete Account' option
This will permanently delete your account and all of your data in Cycles.
Note: if you are using Cycles without being signed into an account, you can simply uninstall the app and all of your data will be permanently deleted.