Email grandromallc@gmail.com and you will hear back within two business days.
To help us resolve things on the first reply, include your device model, your iOS version, and the app version from the app's settings screen.
Check that write access is granted in Settings › Privacy & Security › Health › Core Strength Daily. iOS asks per data type, so it is common for one category to be enabled while another is not.
Deleting the app removes everything stored locally. Workouts already saved to Apple Health stay there until you remove them in the Health app, because that data belongs to you rather than to us.
Refunds are handled by Apple, not by us. Request one at reportaproblem.apple.com.
Both welcome at the address above. Specific reproduction steps for a bug are genuinely useful and get fixed faster.