Domos does this. Every second we measure the local Wi-Fi quality, as well as the underlying environmental factors. We know the state of Wi-Fi quality overall, we know what factors are behind the issues, and we know when and how there are changes from the normal pattern.
If the local Wi-Fi is chronically unstable, or if something new happened that just made it stop working - Domos provides full visibility.
And we will know what’s causing it, whether it was your neighbour's Wi-Fi, bad signal on a device or radio noise pollution.