App Name: Wifi Analyzer [Android App]

Cost: Free

Developer: Webprovider

App Market: Download Page

Description:

Wifi Analyzer will provide useful information about wireless signals around you. App supports 2.4Ghz and 5Ghz.

– Helps to find optimal placement for wifi receivers
– Wifi Analyzer provides you information individualy on wifi channels
– Shows signal strength in history graph
– Wifi Analyzer recommends the best channel for new AP
– Information of the channel width (20/40/80MHz – only Android 6+)
– Wifi Heat Map – let you create heat map of wifi signal quality around you

(If you are looking for more info, check out this article How to Fix Slow Wi-Fi on Android)