Apps for beginning readers:
wiseHopper by Ganomaly, Inc.
The free version offers just a taste, but I liked the grammar portion of the app. The objective is to find the verbs in sentences. The music is calming and students can work at their own pace. However, you will need go to options to turn off the "bully frog." This might be a great short activity to use in a speech center while the SLP is working with another student.
Funtastic Animal Flashcards Lite by Think Design Studio
Use for print awareness, teaching vocabulary, and making inferences. This version shows 20 mammals.
Sorting Machine by F Permadi
Introduce comparatives and superlatives, sort by size, and more.