Take a look at the MASIMO brand.
They make a "personal" line of devices similar to those used in the hospital setting. One problem with all portable health monitors is not having an accurate interpretation of the data. And WE are disconnected from our health records back at the doctor's office. Oh, and battery life. ⚡⚡
This device gives readings on the stuff we talk about here all the time - hydration, breathing rate and SpO2. You can share your data with others with a subscription plan. Take a look:

https://www.masimopersonalhealth.com/products/m...

I need something that will do more than just monitor oxygen is the reason I asked about the Apple watch. Thanks

You don't need an Apple watch; my experience is that they're not very accurate, and you would do much better with a medical grade oximeter. Nonins are excellent and while they're expensive, they less than an Apple watch and much more accurate. They also will work even if you're moving and they accurately adjust for ups and downs as you exert yourself at various levels. It will do just fine as an oximeter to exercise with.

As for the anxiety, there certainly are things you can do. Find a good therapist who deals with anxiety and depression. A good one will help you figure out your triggers and should be able to teach you things that will help you control the anxiety. Meds help initially, but the goal is to help you control it without meds.

Exercise is the best thing you can do for yourself after you quit smoking. Ask your pulmonologist about pulmonary rehab and if you qualify get enrolled in a class. As good one will teach you how to exercise on your own and teach you a lot about COPD in the process with classes. If that won't work, join a gym and talk with a trainer who can help you work out a routine that will work for you. You need to do at least 30 non-stop minutes of aerobic activity. You won't be able to do that in the beginning, so start out as slow as possible and see how long you can go. Build on that iand it won't be long before you're doing 30 minutes non-stop. You also need to do strengthening exercises for the upper, lower and core muscle groups, about 30 minutes three times a week. A trainer can help you with that as well.

Thank you so much I will check this out 👍🏼 I looked at Fitbit but they only collect O2 during the night.