The Bandit Studio desktop application and the Bandit smartphone apps are discontinued as of 31/10/2020. It is no longer possible to download the apps from the App store or Google Play.
You can still use your Bandit camera and download your videos by connecting the batt-stick to your computer. To remove the batt-stick from the Bandit, see Removing and inserting the Batt-Stick on your Bandit