Most of our top-rated free online slots are compatible with mobile devices, including iPhone, iPad, and Android devices. Setting up on your mobile device is easy, as these games are designed with mobile users in mind. You can opt for a free US slots app, or simply open your mobile browser to enjoy the slot games, just like you would on a computer. Mobile gaming has never been easier or more convenient. Theres nothing worse than sitting down playing penny slots and getting cleaned out within two minutes. Most penny slots require you to wager one coin on each line. If the penny slot in question has 50 pay lines, youll be paying $0.50 per spin. On a $10 bankroll, thats only 20 spins between you and bust. Many penny slots offer total bets of $0.10 to $0.20 per spin. Choose those games instead.