Articulation Station is a very well designed and great looking speech app. It was created by a Speech-Language Pathologist. That means the app knows what it's doing, because someone who went to school for a million years to learn the scientific processes involved in speaking created it! But, you don't need to worry about the science, you just need to turn on the app!
It is the only app available that offers practice not only in words, but also sentences and stories containing the sound being practiced.
The app focuses on sounds targeted in the beginning, middle and end of words. These are common and major sounds such as p, b and m; 22 sounds in all and 60 words per sound to practice with. One sound comes with the free version of the app, the others are available as in-app purchases.
Activities includes flashcard learning and voice recording so you can monitor how your child's pronunciation is coming along. There is also a matching game and, as I said, unique sentences and stories to practice with. You can add your own images to the app as well, which is included when all the sounds are purchased through an in-app purchasing. Or, just go with the Pro version, which includes everything.
Compatible with iPhone, iPad, and iPod touch. Free, with in-app purchasing available for additional sounds.