Small tools for specific skin questions
Check an ingredient list, see which actives clash, plan around your cycle, or find out when a treatment should start working. Free, no sign-up, and nothing you enter is saved.
Pore-clogging ingredient checker
Paste any skincare ingredient list to check for pore-clogging (comedogenic) ingredients. Free, private, and based on a 2025 dermatology review, not copied rabbit-ear lists.
Open the toolSkincare conflict checker
Pick the actives in your routine (retinol, benzoyl peroxide, salicylic acid, vitamin C, niacinamide and more) to see which ones you can mix and get a morning and night plan.
Open the toolHormonal acne calendar
Enter the first day of your last period and your cycle length to see your likely hormonal acne flare weeks for the next three cycles, and add them to your calendar.
Open the toolAcne treatment timeline
Enter the date you started an acne treatment to see when to expect results, when to judge it, and when dark marks should fade, based on American Academy of Dermatology timelines.
Open the toolRoutine order builder
Tick the products you use and get the right order for your morning and night skincare routine, with acne treatments in the right place and actives split safely.
Open the toolSkincare expiration calculator
When does your skincare expire? Enter the date you opened it and the number on the open-jar (PAO) symbol to get its use-by date and how many days are left.
Open the toolTrigger experiment planner
Plan a simple experiment to test one acne trigger, like dairy, sugar, a new product, or sleep. Get a dated plan with photo days, a decision date, and calendar reminders.
Open the tool