This works. Get the free version and you'll want to pay for it, too. Any time that I have pain, this gets it. It's got a bunch of routines for different body parts and different problems *would be nice to see one for menstrual cramps relief*. Happy to donate and help keep the app free and with few permissions required. My neck sincerely thanks you, developer!
This app must be installed in addition to the base. Why do I have to have two apps installed?