Can't find app in Apple App Store......Soooooo, Haven't used the app yet, however, am excited to try this! I've been looking for something like this to track the effectiveness of various topical skin creams, red light masks, etc. I try to give each 'new' technology 2-6 months before determining if a treatment works or not. Consider facelift Reddit threads as a place to promote your app.
Had acne as a teen & young adult and have been fortunate to have survived it with multiple years of oral Eyrthromyacin & topical Retin A. Keep up the Tretinoin (Retin A) over time. It is THE MOST effective method for cell turnover & dealing with acne scarring. Don't use Tretinoin around young children if possible & some long time use Eyrthromyacin can cause shading in your teeth (it showed up in mid life in my front two teeth--My Dentist explained--never was listed as a side effect during use).