Paid iPhone app: https://itunes.apple.com/us/app/lightbot-programming-puzzles/id657638474?mt=8&uo=6&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/lightbot-programming-puzzles/id657638474?mt=8&uo=6&at=10l6SU
Paid Android Phone app: https://play.google.com/store/apps/details?id=com.lightbot.lightbot
Paid Mac program: https://itunes.apple.com/us/app/lightbot-programming-puzzles/id924624572?mt=12&uo=6&at=10l6SU
Free iPad app: https://itunes.apple.com/us/app/hopscotch-programming-designed/id617098629?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/hopscotch-programming-designed/id617098629?mt=8&uo=4&at=10l6SU