Iphone apps disapeared after an update?

I did an update on my phone, and when i turned it back on, all my apps were gone except for the ones that already came with the iphone. When i go to the app store and try to download them, i will type one in like "facebook" and on the top right where it usually says "free", it now says "open".so i can get to facebook that way but i want to download it to my iphone like it was before. How do i do this?

I'm sorry buddy I never heard a case like this before maybe those apps are in your iCloud and also try turning the phone off then on

I would recommend doing a restore in iTunes. This is definitely a strange case

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