No, you won’t need to buy new apps if you don’t want to. The point of this course is to show you how to use all the key features that are standard across most photo editing apps.
If you can edit with one app, then you’ll know how to use most other apps too (even ones not covered in this course).
But, if you do wish to invest in a new editing app, then many of the ones we cover are inexpensive (and in some cases FREE!).
Following this course, you may choose to cancel an existing subscription in favor of a much cheaper, but equally powerful alternative.