You'd equip half a city's ambulances with the devices, and track whether use of the Dechoker reduced tracheotomy rates.
A further complication is that the Dechoker would probably only work for solid objects, so emergency responders would have to determine the nature of the airway obstruction before deciding whether to use the Dechoker, or some other method (i.e., another suction device to remove semisolid debris like vomit). So you'd additionally have to track what the nature of the obstruction was and exclude cases where the Dechoker was applied inappropriately, or where the Dechoker was not used and it could have been.
It is a 510K-exempt Class I medical device, according to the FDA. So its manufacturer has registered with the FDA but there is no FDA approval of its claim of being able to dislodge objects from a patient's airway. Nor is any data provided to demonstrate that it is at all effective.
Thanks for your remarks on KeePass; I have at times been a heavy user. I've often wondered about its security (especially the security of its ports) but I don't have the expertise to evaluate it myself. I'm not aware of any audits or systematic analyses as it hasn't received the attention that mobile password managers have.
The truly paranoid keep their KeePass database in an encrypted volume used solely for that purpose.
I was not able to find your privacy policy. Are you tracking what beers I'm looking up? Where I am? How long I spend drinking? Are you serving ads generally or are they somehow targeted to me based on my behavior? Do I get more privacy with the pro version?
You will be collecting data that will be useful to other people besides me. I don't care if statistics on all app users are sold but if you want to sell things based on my specific behavior I won't use your app.