This wifi fixer you speak of doesn't exist on the play store. It must have a different name. That's what I was asking about earlier. There is no "Wifi fixer" app.
https://forums.androidcentral.com/e...etails?id=org.wahtod.wififixer&token=T0OY-Dsh
Here you go
Done a search with wifi fixer on playstore

sent by my Galaxy S4