Here are a couple of apps that help with reading — one which shows how words sound and another which helps decode their meaning.
Reading Machine is a free app for iOS which sounds out words for struggling readers. For example, the world “night” is separated phonically into “n” “igh” and “t”. Although it will sound out any word entered, the phonic separation feature is available for the basic words.
Root Words, a free dictionary app available for Android, helps you in learning English root words to improve your vocabulary. Root Words has all the important Latin and Greek root words along with explanations and examples. The app also lets you quiz your knowledge of root words using multiple choice tests