Recently we have reviewed Justin's World Goldilocks app and Jigsongs app. Middleman loves them and I wasn't sure if he would like the letter sounds app as it is more phonics based. However, he seems to be enjoying it, and I feel less guilty about him playing on my phone when it his helping him with his phonics.
So if you are looking for an educational app for your little one and they love Justin Fletcher, then this might be worth considering. It can be purchased here from i tunes.
We were given the app for the purpose of this review, but the opinions here are my own.