That’s probably because it’s fairly widely known (in Australia) that if you’re bitten by a red-back or funnel-web spider that you seek medical attention, as you would for a venomous snake. A quickly treated bite is almost never fatal.
The app helps people make the decision as to whether its a harmless spider or something that requires urgent medical attention.
Yeah, definitely: I'm only trying to highlight that this sort of app wouldn't actually do much in practice because (Australian) society already deals with such bites well. If everyone in Australia had the app and used it all the time, it still would have (maybe) prevented at most one death in the last 40 years.
In fact, since the numbers are so small, widespread useful of such an app seems like it may actually increase the number of deaths: instead of people seeing an unidentified spider and intense pain and getting treatment, people may get a false classification and so endure the pain without prompt-enough treatment ("the app says it's just a [something other than a funnelweb], I'll be fine!").
Generally, a redback is fairly unpleasant, but doesn't require a trip to the hospital (for a healthy adult), so its unlikely to be fatal in most cases anyway (thankfully!).
If you’re going bush walking, you’d usually take a snake bite bandage. If you’re otherwise healthy and have other people with you, you’ve got a few hours to get yourself to a hospital or ambulance.
The app helps people make the decision as to whether its a harmless spider or something that requires urgent medical attention.