For the Launchpad app, we currently support one iOS below the most current iOS. At the time of writing this article, the latest iOS is 15, meaning we currently support iOS 14 as well. Groovebox and Blocs Wave are slightly different, with the minimum iOS requirement being iOS 13.
If your device is on a lower iOS than the minimum requirement, you won't be able to install any of the apps if you have not already done so before. If you have installed the app before, you will no longer be able to update to the latest versions, unless you update iOS.