This excellent website may be useful for information and resources for working with children with speech, language and communication difficulties.
http://speechbloguk.com/freebies/
Top speech and language apps for 4-7 year olds
http://speechbloguk.com/wp-content/uploads/2015/05/HANDOUT-4-7-year-apps.pdf
Top speech and language apps for 7-11 year olds
http://speechbloguk.com/wp-content/uploads/2016/01/HANDOUT-7-11-year-apps.pdf