Polaroid made an app that copies apps that copied Polaroid cameras. Polamatic is available in the iTunes App Store and costs √¢‚Äö¬¨0,79. Additional filter packs are available for √¢‚Äö¬¨0,79 each.
This is the original size of the saved photo, which is 572×692 pixels. I hope they increase that size in an upcoming update.