The Healing Brush Tool? It's pretty straightforward. It acts like an intelligent version of the Clone Stamp Tool.
With the project open and the desired layer selected, you tap the "Source" option, tap what you want to cover the blemish with and then begin painting. When you release, PS Touch will work its magic. You can, of course, adjust brush options by tapping, "Brush."
Note that, like the Clone Stamp, the effect is more convincing when covering areas that are similar and congruous.
Thanks for your answer, really appreciate it