Apple iTunes has a Free iTunes Game App Sale: SpongeBob Moves In (normally $3.99).

About

Dive into Day 1 of SpongeBob’s life in Bikini Bottom! Move him into his Pineapple house, get a job at the Krusty Krab, and build your very own Bikini Bottom! As your town turns into a thriving undersea city, you’ll unlock new characters, buildings, decorations, and areas like Jellyfish Fields.

Requirements

• Requires iOS 5.1.1 or later
• Compatible with iPhone, iPad, and iPod touch
• This app is optimized for iPhone 5, iPhone 6, and iPhone 6 Plus