Android apps to test your mobile cell and wifi data

Often when traveling I have to rely on my trust Nexus 4 android phone to connect to the interwebs, be it on the phone itself or when tethered to my laptop. As such, I often want to test both the wifi and cell data connection on my phone. Most of the time I need to run these test when looking at a new hotel or condo to rent, but also when the connection seems a bit dodgy in an area that was good.....