Looks like the digital peak flow meter would be a good investment. I noticed they showed a gadget called the Breather. I'm not sure if that is something that would benefit me or not. The respiratory therapists I saw didn't really suggest anything other than exercise and walking. I can get my blood oxygen levels on my Apple Watch so that takes care of that. I have Raynauds so they can't get a reading from the oximeter. Thanks for the suggestions.