You are downloading the Asus Router Monitor AppX file v18.104.22.168 for Windows Phone. Asus Router Monitor is a free and useful Productivity app: I created this app to monitor traffic and usage of my own router. I have verified that it works with Asus RT-AC66U and RT-AC52U routers. Please ... You can now download the offline AppX file to install & try it.
Download Locations for Asus Router Monitor 22.214.171.124 AppX file
Note: To install it manually from an SD card, you should choose one of the server location above to get the offline Asus Router Monitor AppX file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.