Simoleons are the main currency used in The Sims FreePlay and other Sims games. It is represented with a section sign (§). Sims can earn money by cooking, working, their pet(s) finding it, gardening or collecting revenue from the town map. One can use them to buy furniture, houses, cars and shops. They can also buy Simoleon packs from the Online Store. Simoleons are the official currency of SimNation which is used in all games in The Sims Series.
If players leave their game for a week or longer, when they return, they will receive free Simoleons (amount varies).
The maximum amount of Simoleons one can have is §100,000,000. After they reach the limit, they cannot purchase any Simoleon packs with real money.