Starfall.com is a free website for teaching kids how to read. You can also download the 4 separate Starfall apps from your play store (for free). The 1st is Starfall ABC's - it teaches letters and sounds.
The 2nd is Starfall Learn to Read - it has easy books featuring CVC words (consonant - vowel - consonant, like cat or pan). It also has games where your child picks the beginning letter of a word.
The 3rd is Starfall It's Fun to Read - it includes short audio books in the following categories: Art Gallery, Music, Magic, Poetry, Tongue Twisters, and Bird Riddles.
The 4th is Starfall I'm Reading - it includes longer stories (you can listen to the audio or turn it off) in the following categories: Plays, Fiction, and Nonfiction, Comics, Folk Tales, Greek Myths, and Chinese Fables.