In the upcoming couple of months, UDisc will no longer be maintaining the watch app on the App Store for devices running watchOS 6. This will mean that anyone with a 1st or 2nd generation Apple Watch will no longer be able to install UDisc on their watch, from the App Store.
If already installed, the UDisc watch app will remain on your watchOS 6 device. However, you will not receive any new features, and there could be unexpected behavior. If it is deleted from your watchOS 6 device, you will not be able to install it again from the App Store.