I purchased this app, why do I need to “sign up” – Real Estate Exam For Dummies Review

I purchased this app, why do I need to “sign up” on my own app? This is REDICULOUS! I don’t need emails from you... it’s already on my phone... I PAID for it.... WHY ARE YOU ASKING FOR MORE PERSONAL INFORMATION?
Review by MomWonder on Real Estate Exam For Dummies.