Company Reading Doctor Pty Ltd created these great apps:
Word Builder - The Phonics Teaching Tool, Letter Sounds 1 : Phonics Graphemes for Beginners, Letter Sounds 2 : Digraphs, Trigraphs & Endings, Letter Sounds 1 Pro, Letter Sounds 2 Pro: Easily teach the links between letter patterns and speech sounds for reading and spelling with phonics, Sight Words 1 : Common English Words, Sight Words 1 Pro, Blending Sounds 1 : Phonics Words for Beginners, Spelling Sounds 1 : Writing Words with Phonics, Blending Sounds 1 Pro, Spelling Sounds 1 Pro, Reading Doctor Online, and others..
