If you’re on hormonal contraception that suppresses ovulation then you can still use the app to track withdrawal bleeds and lifestyle factors including mood, exercise, sleep, etc. You’re unlikely to see any meaningful patterns with regards to cervical fluid and waking body temperature though.
If you're preparing to come off hormonal contraception and use a fertility awareness-based method (FABM) then you can get started in the app right away to build your charting techniques and habits! You're unlikely to see any meaningful patterns until you stop your hormonal contraception though.
We warmly recommend working with a certified educator to learn a fertility awareness-based method (FABM) and navigate the transition off hormonal contraception.