This app was mentioned in 2 comments, with an average of 1.50 upvotes
Hey! Not OP but I'm pretty sure the "Gibson" app is this one here, it's a mobile app. I've heard this "Crucial Exams" one is better though. Enjoy!
Paid
Darrils A+ App
PocketPrep A+
Free
Crucial Exams
Professor Messer
Exam Compass
Good Luck!