Schweser Secret Sauce and Stalla Mobile App

[merbpr]

I studied with the CFA Institue books and did EOC questions.
Recently, I reviewed the Scheser Secret Sauce book and the Stalla Mobile App. From what I saw, they both look amazing.
I would like to obtain feedback on the following:

• Does the Secret Sauce help you refresh key concepts?
• Does the Stalla Mobile App prepare you adequately for the exam?

Thanks!