https://itunes.apple.com/au/app/place-value-mab/id507890987?mt=8 – A Place Value app created by Little Monkey Apps. It does cost $1.99, but I believe it is an app that could be used multiple times.It is not designed as a game rather as a teaching tool. I have added a video below which shows you how the app works. As I have mentioned in previous posts apps and websites tools are only one component of a child’s learning they still need to learn with concrete materials. I have added a You Tube clip below I found which shows how to use the app.
https://itunes.apple.com/us/app/base-ten-number-blocks/id474636096?mt=8 – A place Value app which uses MAB/Base 10 blocks. It costs .99 but again I believe these open ended apps are ones which can be used multiple times.