(edit: removed redundant rants and added updates)
I recently got diagnosed with a condition (sleep apnea) which means I need to use a machine (CPAP) to have a proper sleep, probably for the rest of my life. The doctor wanted me use the device for a few months, and bring the "report" generated by the device to monitor my progress and discuss further treatment.
I thought it would be a simple task, like using a program or accessing a local network service like a printer would and download a file. However, as I consulted to the device distributors in my area... their sales pitch (disregarding the actual medical functions) were:
A) The machine is constantly connected via wi-fi or cellular to manufacturer's server, and user downloads the report via manufacturer's website or an app.
B) The machine has an SD card slot to which data is copied, but user have to bring its contents to the authorized distributor so they can convert them into a report file.
TL;DR: Very unsatisfied with either options. I never asked for this.
Update #1: For the reports, there's a program called OSCAR (www.sleepfiles.com/OSCAR/) that supports conversion of SD card data. Check device compatibility first. For sleep apnea related discussion, there is a forum (www.apneaboard.com) dedicated to it.
Update #2: From all the available brands, I'm inclined to buy a Chinese brand (Yuwell) simply because of costs alone, even if it is not supported by OSCAR. I see a lot of people recommending ResMed (which has OSCAR support) both online and offline, but the cost is prohibitively expensive for someone in my financial situation with local market prices. Still have to think about it.
Update #3: There's an asshole in the comments arguing "what's so special" about sleep related statistics being copied around. I concern was how those statistics get associated with customer identification (metadata) as distributors often do. Anyways, won't waste my time with the "got nothing to hide" type of dumbfucks.
Just use OSCAR to get the data locally from the SD card.
https://www.sleepfiles.com/OSCAR/
Learn more about the machine and do your own management as well. It’s very easy to get into the machine settings to control your air flow, temperature settings, and so on. Take the time to learn what the data from the machine means.
Years ago the predecessor to Oscar didn't support BMC devices, and doesn't look like it's changed. Yuwell isn't listed either. Otherwise would be great. Maybe just don't connect one of the more established ones?
https://www.apneaboard.com/wiki/index.php/OSCAR_supported_machines