Single button controller / Iris SmartButton alternative

Depends on the use case, but there are quite a few options:

Battery-operated Z wave and Zigbee switches do tend to go to sleep if they haven’t been used for a while. So sometimes people who use them every day don’t see a problem where someone who only uses it once a month will. ( I suspect this may have to do with the amount of “active” history that smart things keeps. )

So if the buttons are used infrequently, you may want to consider one of the mains powered options instead. Or go for a tablet controller like SmartTiles in a web browser.

Again, it all comes down to the exact details of these case.