You can reset the i OS App Store cache by tapping at least ten times on any of the tab bar item, including “Updates,” “Search,” “Explore,” “Top Charts” and “Favorites.”Apple has adopted a fast beta/release cycle with i OS 9, with two major updates since the operating system’s initial release in September 2015.
i OS 10, the newest operating system for the i Phone and i Pad and a free update for anyone with an i Pad 4 or later or an i Phone 5 or later, offers a raft of new features and various tweaks to the interface: but it's not all good news.
This should reset the i OS App Store cache and your issues should go away.
If this doesn’t work, try force-quitting the app and then reopening it.
If these troubleshooting steps don't help, please contact Apple support.
If you’ve been having problems with the i OS App Store for the i Phone, i Pad or i Pod Touch, there is a simple and easy fix that may be able to solve your issues.
Large numbers of people have installed i OS 10 and then hit a snag of some kind.
Sometimes, a problem with the cache in the i OS App Store leads to the Apple store app not working properly.To clear the cache in the i OS App Store, simply tap on the menu bar at the bottom of the page more than ten times in rapid succession.This can be done by activating App Switcher by pressing down the home button twice and then swiping up on the open app.If neither of the two fixes work, try signing your Apple ID out of the i OS App Store before doing a soft reset on your i Phone, i Pad or i Pod Touch.
After you restart your phone, try installing the Instagram app again.
Some people have reported that syncing their phone with i Tunes and reinstalling Instagram from i Tunes helps with this process.