Have you ever been connected to a slow Wi-Fi network, while there were nearer WiFi access points, so that you needed to switch network in your settings and exit the application you were using?
So WiFi auto Switcher is the application that you need!
Wi-Fi auto Switcher is a light and simple application and the only thing that is required to do to make it work is to open it once, then forget about it and let it take care of your connection.
When Wi-Fi auto Switcher is running it detects the network with highest signal level among your already configured networks and connects your device to it.
Wi-Fi auto Switcher works autonomously and it starts automatically working on boot when you turn on your phone (this can be disabled in settings).