For newer devices, all our apps are now fully optimised for iOS 13 and Android 10. For older devices, we continue to support back to iOS 8.4 and Android 4.1 in the current versions of all our apps.
Following on from user suggestions, Special Sentences now has a new option "Place cards in order". If you turn this on in the settings, then your child must build each sentence by placing the first word in the sentence, then the second, and so on, in order. When it's off (by default) the cards can be placed in any order, as before.