It connects via bluetooth and not WiFi. If the company goes belly up, I'd just need the APK and an android phone to continue using the app to configure the valve and see/download water usage data.
Fast forward 20 years when I can't install the APK on android v79, I'd need an older phone to run the APK.. but that seems to be pulling hairs.
Apps would be great, it's how you handle the backend to it that's the gotcha.
I also have a water softener with an app that no longer works that had it's backend shut down. It can still be configured via the valve head button presses, but none of the "smart" usage data is available. As an example of good design, this is a perfect dichotomy of one company doing it well and one company doing it un-well[sic].
I saw in another post that a person said there's a difference between "device dependent" and "device augmented" that really resonated with me.
There's diminishing returns on everything, and just throwing your hands up on any subject as bad/good might be a disservice.
If I live through an era where phones are no longer a thing and APKs are a thing of the past.. then I either...
A. Don't use the iron filter like that anymore. (manual programing now) B. Get a new iron filter. (ewwwww) C. Keep a legacy-device for the purposes of programming the iron filter. (doesn't need any internet connection or subscriptions)
(C) would be my most liked solution.
40 years? How about, like, 3 to 5 years? Remember when Apple decided to kill all 32-bit iOS apps for new hardware? I have an old iPod and iPhone 4S with "landlocked" software I enjoy using but can't anymore because Apple.
Phone manufacturers have shown they don't give a damn about allowing old software to function. Physical devices tied to software is a terrible idea.
Also there are evergreen interfaces, so to say. An RS232 / RS485 connector that serves 115kbps 8N1 serial interface and runs a VT220-based TUI should still be serviceable 40 years from now (VT220 was released 42 years ago). A now-modern web-based GUI also has a great chance to be serviceable 40 years from now.