It’s such a pleasure to be invited by Joanne Carter to share my mobile phone video tutorials in the new TheAppWhisperer section, How I Did It!™ with Rad Drew. Thank you for this opportunity, Joanne! Today I want to introduce the app, Formulas – Photo Lab Effects and Custom Frames (here after referred to as ‘Formulas’ in this article), by the developer Samar Azzam.  Formulas is a companion app to the powerful layers app, Stackables, (which I’ll cover in a future tutorial).  Formulas features 37 formulas created by mobile photographers from around the world using the companion app, Stackables. In addition to these featured Formulas, when you create your own…