Question: I recently did a backup of a FAT32 disk which contained a lot of diverse data. It contains many media files, many big binary files, and as usual with FAT32, it has all kinds of odd (but potentially important) permissions for all of these different files. The whole directory of this backup weighs in at a few hundred GB. I would like to have a compressed archive of this backup, but I have a few requirements from whatever archival utility that I use:

* It needs to preserve extended attributes
* It needs to preserve timestamps
* It needs to preserve permissions
* I would like for it to preserve as much metadata as possible

I know that there are many different archiving utilities which fit at least some of my needs, but I would like to know of one which fits them all. I.e., which one can maintain the most metadata and also (preferably) has a good compression ratio for a diverse data set.

Answer: 
This can happen for a number of reasons and you might not know why.

First, do the easy stuff, like you already did. Search with Spotlight, check for a new Home screen by swiping to the right, and check all your folders.

If those don't work, try a [hard reset](https://www.wikihow.com/Hard-Reset-an-iPhone). After you restart the iPhone, search for the app again.

If the app is still missing, delete the app and reinstall it from the App Store. To delete the app (in iOS 11), go to `Settings -> General -> iPhone Storage` and find the app.

Tap the app and on the next screen select `Delete App`. 

After the app's deleted, go back to the App Store and redownload the app again. Hopefully, it will install correctly this time and you'll be able to see it on a Home screen.
This happened to me and I finally found the app where I had embedded it two folders deep. Remember that home screens can have folders within folders.