It's insanely easy to use and is one of my favorite apps. Splitting rent, utilities, etc with a roommate, settling a debt with an out of town friend, etc. Basically any time you write a check to another individual, Square Cash turns that process (finding your checkbook, writing a check, mailing it, opening the letter, endorsing the check, mailing/delivering to the recipients bank) to opening the app, typing the amount, and pressing Send or Receive.