Managed apps are those that are already in the Skykit system. These are included in the device’s firmware and will be re-installed if you factory reset your device.
Device apps are not in the Skykit repository but can be downloaded and installed. If you are running your own application as your kiosk app instead of the Skykit Player, this would be a device app.
Installing device apps can lead to unexpected issues, so as a best practice Skykit recommends you reach out to support or your Customer Success Manager first.