The At Home Sleep study is listed as disposable.
Can I keep it and use it to monitor my sleep quality after diagnosis by the doctor?
Am I able to view and store the data myself on the App from the Apple store?
No, that is not possible. I asked.
It depends on the device and its app. Since it is listed as disposable, I’d check with the provider whether it can be reused and if you can access and save the data yourself.