The Sims FreePlay is a free (read: pay for advanced content) version of The Sims in full 3D, with a mission-based progression. The main difference here is that actions take place in real time. This means that if in real life going to the bathroom to pee would take you 30 seconds, your Sim will take 30 seconds to pee. If your Sim is tired and needs to have a nice long 7-hour sleep, then it will take 7 real-time hours for the Sim to wake up. The game also uses your clock, so if it's 9 a.m. for you, it will be 9 a.m. in the Sim's world as well.