What version of iOS or Android operating system do I need to use Tactus Therapy apps? May 21, 2019 23:51 Updated Follow Current minimum iOS version: iOS 9 Current minimum Android version: 4.1.x Related articles Which platforms or devices are your apps available on? Which device is best for using Tactus Therapy apps? Can I use your apps on a Mac or PC (Windows) desktop or laptop computer? Do your apps require wifi or an internet connection? We have lots of devices. How many copies or licenses of each app should I buy?