SkinLog is a free app that enables you to snap selfies and view them in great detail. The app also allows you to track the health of your skin. With it, you can view a month's worth of data, including the number of times you took a picture, how long you slept, your stress index, the most prevalent skin complaints, and how each record evolved over the course of a month.

The app can also help you with a number of issues, including acne, pigmentation, and more. You can also use it to keep track of the health of your skin, to monitor the impact of your lifestyle habits, and to track the progress of your skin treatments.

If you want to know how to use SkinLog, please read the manual.