Folicle is a hair-growth tracking app that aligns each new scalp photo to the previous frame, so progress is actually comparable over time. Log treatments (minoxidil, finasteride, and more), follow your Hair Score, and export a dermatologist-ready PDF timeline for your next appointment. Non-diagnostic: it documents progress, it doesn't diagnose or prescribe. iOS + Android — join the waitlist at folicle.app.