What version of iOS or Android operating system do I need to use Tactus Therapy apps? April 10, 2019 03:05 Updated Follow Current minimum iOS version: iOS 7 Current minimum Android version: 4.1.x Related articles I bought an app for iOS/Android. Do I have to buy it again for the other operating system? I'm trying to buy but the transaction won't go through. What should I do? How do I buy and download your apps on my Apple device? Can I use your apps on a Mac or PC (Windows) desktop or laptop computer? Which platforms or devices are your apps available on?