Yes, some free slot machine apps offer the chance to win real money. These apps often have in-app purchases or advertisements that generate revenue for the developers, and they might also have a system where you can earn virtual currency or tokens by playing the free slot games.
Free Slot Play is non-transferable, cannot be converted to cash and must be played at a slot machine before other credits. Once you have downloaded Free Slot Play, you must play at that machine. The amount you select to play must be divisible by the denomination at play.