Wifi Analyzer

Wifi Analyzer is a free Android app you can use for finding APs on your Android-based smartphone or tablet. It lists the basic details for APs on the 2.4-GHz band, and on supported devices on the 5-GHz band as well. You can export the AP list (in XML format) by sending it to email or another app or take snapshot of the screens. It also features graphs showing signals by channel, history, and usage rating and also has a signal meter feature to help find APs.