The iTunes Store offers select iPhone and iPad apps for free, as listed below. The deals:

• InstaTrack for Instagram for iPhone / iPad for free ($1 off)
• ARPhoto - Special Effects for iPhone for free ($1 off)
• Recreate - the Then & Now Camera App for iPhone for free ($2 off)
• SlapSticker – a Photo Sticker Maker for iPhone / iPad for free ($1 off)
• Impressia for iPhone / iPad for free (pictured, $1 off)