Is there an Android app that will allow me to see all devices that are using my wifi router ?
Although not Android specific there is an Open Source, multi-platform program called Angry IP- that will let you scan you network.For details you can visit their page at: http://angryip.org/w/HomeIt's a nifty little tool
I don't think so
maybe, you could also go online and to the actual provider website, they probably have it
I found one called "wifi watch", but I don't have android and never heard of the publisher before.