Lip Re-tractors make it difficult to talk. You can order lip re-tractors from a lot of different online stores. There are 3 different sizes that I have seen for sale: Small, Medium and Large. For most adults, large is a good size. Teens and younger/smaller adults might find the medium size works better. I would guess anyone under 13 years old may want the small size.
Get the installer of Open Mouth Phrases 1.0.72 that is provided for free and have a look at users' reviews on Droid Informer. The app is designed for Android 2.3 and higher. This application is completely safe for downloading. The game is created by Jetacer Interactive LLC and its category is Word Games.
The developer released a new version of Open Mouth Phrases on Sep 14, 2016 and over 5K users downloaded and installed the app. This application is created for people aged 17 and older, its overall score is 4.3 on Google Play. Some in-app purchases and advertisements are included into the game.