TallyLab doesn't limit what you can track to a single category – e.g. fitness, food, sleep, weather, etc. – because life doesn't happen inside of tidy categories.
Maybe you suspect you have a food allergy but you're having a hard time connecting specific foods to specific symptoms. TallyLab can help you track what you eat, track your symptoms, then compare the two over time to find trends.
Maybe you're an avid birdwatcher. TallyLab can help you keep track of which species you saw where and when, and further help you determine what conditions, locations, and times are most optimal for seeing different species.
Maybe you want to know how many times and at what intervals The Dude refers to himself in the third person during The Big Lebowski. TallyLab can help you keep track of what The Dude says in real time, then analyze the pacing.
Maybe you're just having a hard time remembering if you took your vitamins yet today or when the last time you changed your pillowcase was. TallyLab can keep track of both of these things (and tell you if you're more likely to forget to change your pillowcase whenever you forget to take your vitamins).