Use there are few makeup brushes on the main screen (it's not an effect).
1. Tap "brush" - the leftmost icon at the bottom of the main screen
2. Scroll the brushes all the way down until you get to makeup
- Use the light makeup brush for skin color and subtle tones (also for great for coloring a black-and-white photo)
- The dark and tint makeup brushes will yield more visible makeup