Rovio’s Bad Piggies has been out for a while now, but in case you’ve been on the fence about buying it, a free version has been released so you can make up your mind.
The free version comes with 25 levels, 1/4 of what the full app comes with. Of course, you’ll also get tons of ads with the free version, which really does ruin the experience. If you like it, spend the $1 required for the full version (more if you have it on iPad).
You can download the iPhone version here and the iPad version here.