Symptom Tracking with Symtally. Get a full picture of how your health affects your day with Symtally. All it takes is a moment to rate how you feel and let Symtally tell you the rest. What is a Symtally? Symtally is a weighted average of your symptoms that measures how you feel on a given day. Features ✔ Symptom Tracking - Create and track your symptoms. ✔ Track Times - Track the ups and downs of each symptom. ✔ Customizable - Track anything you can rate. ✔ Notes - Add your own thoughts da