can't find app option on itunes library

Management of apps, books, and tones has been removed from iTunes 12.7. See Changes in the new iTunes - Apple Support for details. The intention is clearly that management of these generally takes place on the device.

See the Manually add items from your computer section of Manually manage content on your iPhone, iPad, or iPod touch using iTunes - Apple Support for the control that remains. This can be used to copy apps, ePubs, iBooks, PDFs, and tones from your computer to your device. The File Sharing feature for copying data between apps and the computer is still there. You can also use iCloud Drive, or Dropbox to move content to and from the device.

A long time criticism of iTunes, at least from some quarters, is that has been that it has become bloated. Perhaps this is an attempt to address that. I let both my iOS devices update automatically when there is an updated app, and I'm not interested in hanging on to old apps that a developer has withdrawn, nor do I need to rearrange my apps often, so while the change is drastic, I don't think it really affects me much. I'm more irritated by the changes to iTunes U and iBooks in iTunes for Windows.

32-bit apps are not supported in iOS 11. Any data associated with such apps is lost unless the developer decides to supply an upgrade, and perhaps even then. For those yet to update to iOS 11 any incompatible apps should show under Settings > General > Applications > App Compatibility.

tt2

See Managing apps with iTunes 12.7 or later. If you choose to revert to iTunes 12.6.3 you will need to restore a pre-12.7 version of your library database as described in Empty/corrupt iTunes library after upgrade/crash. Windows users also need to remove 12.7/12.7.1 before they can install 12.6.3.

tt2

That is awful. I find it virtually impossible to simply use the iPhone screen to re-arrange my apps. I have to use the iTunes library for that function. Now I have a few new apps and they are all over the place. I like to organize my screens and this really, truly ***** for me. Thanks for the information.

Apps are not showing up as an option to check in preferences.

That's because it is now 3 years later, and the latest version of iTunes does NOT show Apps.

You can drag and drop directly from Finder to the device where it appears in the sidebar in iTunes.

You should also be able to deploy from Xcode. See Apple Developer - Testing Your iOS App.

tt2

Make sure you have it enabled.

Open iTunes Preferences (CTRL+,) > General > make sure Apps is checked

It looks like the apps aren't in your iTunes library.

Transfer them from your device:

After connecting your device to the computer and its icon appears in iTunes, go to the File menu (ALT+F), then Devices, and choose Transfer Purchases from "(Your device name)".

or

Download them from the iTunes Store:

Go to the iTunes Store and select Purchased in the Quick Links section on the right, sign in and select Apps then Download All on the bottom right

is there any fix for this?

Oh my god! How can I develop apps on iOS? Cannot find way to install app during development.

Please help. Thanks.