Use APKPure App
Get ZANTI old version APK for Android
check router vulnerability with zanti app.
Zanti app is very useful if you're the owner of a WiFi network.
Discover unsafe elements on any wireless network
With Zanti you can put your wireless network to the test and discover whether there are any intruders connected as well as its possible vulnerabilities
This app is totally 'Free'
And of course, you shouldn't use this app to steal your neighbor's WiFi.