Apple iOS, Android, Blackberry, Windows Phone, Amazon Fire OS, Palm WebOS, Bada, and Symbian. (every platform we've ever heard of, and then some)
But also using any modern browser on any mobile device or PC.
Water Hero uses the home's municipal water meter to detect leaks and pipe bursts. Home's on well water lack meter's, which is of course nothing to be ashamed of.
The Water Hero product road map includes accessories suitable for a "Well" Water Hero.
The Water Hero works with a Ball Valve. A solution for a Gate Valve is coming.
BUT, and this is a BIG but. A Ball Valve is far superior to a Gate Valve. Over time, an unused Gate Valve will get difficult to turn, the stems can break, and they have a tendency of leaking. Gate Valves do not age well. Upgrading your plumbing main shutoff to a Ball Valve would be a very good thing to do. Unfortunately this requires a plumber.
Yes. There is an international purchase option. Unit ships with a 100 - 240 VAC power supply with a US plug AND an EU Plug adapter. Overseas positive displacement water meters should work similarly to the units we find in the United States, but buyers should confirm.
Water Hero cannot be shipped to Germany for the time being, because of difficulty in shipping Spark Core chips to that country. See details at Spark's website.
Don't see the answer to your question? Ask the project creator directly.