Even though I have some knowledge of excel formulas I may forget why I have created a particular formula. I have quite a few long ones. Formula dog actually helps me quickly review and understand the formulas that may have taken me hours to create but that I've forgotten now because so much time has passed. I have found when I'm creating new formulas in excel that it's best to think about it first and be specific. Breaking up your long formula into smaller chunks, feeding it into formula dog and then putting it together yourself works best for now. Hopefully this will improve. I really like the sequel function of the app. I was surprised that It actually allows me to create a simulated a database and then test queries on it. It's helping me learn database structure and queries before I actually have to create the database. Kinda cool.  Hopefully I'll be able to play with vba in the future which has been challenging for me to learn.