Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
I would guess your rooted,So you can use FX Explorer to uninstall the app:
https://play.google.com/store/apps/details?id=nextapp.fx&hl=en
https://play.google.com/store/apps/details?id=nextapp.fx.rr&hl=en