This app was mentioned in 1 comment, with an average of 3.00 upvotes
I thought about how apps could help me in medical emergency situations and had a look around at existing solutions. Here's what I came up with:
The app should
make it easy to dial 112 (911) and put them on speakerphone like you mentioned
help me determine my location as an adress (or GPS coordinates without adress) in unfamiliar surroundings, like when I'm on a bike tour or something
have a CPR metronome
(maybe: have an AED database and tell me when one is nearby)
(maybe: call other app users nearby for help. But there are already apps for that like Pulsepoint and it could be abused (prank calls, lure people in to mug them or something)
Here's what I found so far:
emergency app, Maltese emergency call tell you your location/GPS coordinates and give you a big "call 112/911" button. The one with the map might be better usable when the mobile has trouble getting a proper GPS fix ("The mobile thinks I'm in this general area, +/- 500 m. But looking on the map, I think I'm near xyz street right now").
btw "GPS fix": sometimes it takes quite some time to get a proper one and when you close the app (because you're calling 112) it stops trying. An app like GPS connected might help, but that's one more app you have to think of. Would be great if the emergency app would do that without the need for another app.
CPR metronome: This one is looking pretty good, but when you close the app it forgets everything and starts from scratch when you open it the next time. I think the app should remember the CPR start time so you can tell arriving EMS exactly how long you've been doing CPR. Also the blinking light could be a bit bigger or could make use of the LED light on the phone for situations when you don't want sound or vibration, but just a visual metronome.
Guides (video / audio / text and pictures): I've got this one on my phone, but I rarely use it. I think it's okay to have a different app for that, because it's more like a small refresher course when you've got nothing else to do. But in my opinion it wouldn't be very helpful in an actual emergency situation. If shit hits the fan, I probably wouldn't have time to look up guides or videos plus I would probably have the 112 operator on the phone anyway guiding me through what to do until EMS arrives.
AED database: there may be lokal databases like this one which apps may be able to use. I don't know if there are worldwide ones already and how good they are. By the way, I just checked out their app and it seems pretty good: There's a big "call 112" button, a map with AEDs (and you can report new AEDs to the database) and it tells you your location.