Offloading the app will free up storage space while still keeping its documents and data. If and when you reinstall the app, your data will be there.
Note:
Before you clear the cache on your iPhone, make sure you know your passwords, since deleting your cached data might log you out of some accounts.
Offloading differs from a deletion in that it leaves your stored data intact while erasing the app's data.
How to Offload Your App:
Open the Settings app, then select General.
Tap iPhone Storage.
Scroll and select the SignOnSite app.
Then tap Offload App.
Select Reinstall App; this will reinstall the app and place back all app data that are still present on the iPhone. In some cases, you may need to sign into the app again.
