I ended up sideloading them again and rebooting but the same issue occured!
Lingodeer freezes when opening and Memrise pops up with an error stating "oops something went wrong, you may be out of internet data..." which isn't right because I'm using internet just fine! I even tried to switch to mobile data to see if this fixed it but it didn't. However when you press the refresh button on memrise, it ends up being stuck on an infinite loading page.
Not sure what's happening but I don't have this issue if I use a android emulator but I wanted to use these apps on my iphone.