Whilst InSSIDer is a great free tool for use on your PC (or even a Mac!), what about your Android phone? Well, now Metageek have released a version just for Android.
InSSIDer for Android will show the Wi-Fi channels around you and help you to find a less crowded channel for your wireless router. InSSIDer for Android logs channel data for every room in a building in order to statistically determine the best channel for wireless network performance.
3 Easy Steps to better Wi-Fi with inSSIDer:
1. Select your network
2. Walk the area needing WLAN coverage.
3. Press “stop” to see the best performing channel.
Download it here: https://play.google.com/store/apps/details?id=net.metageek