Is there a LocalStorage limit on iOS when app is built?

I am using LocalStorage to store cached data. All of a sudden I am getting the following error in both simulator and when I build the app on my iPhone:

Error: QuotaExceededError: DOM Exception 22

Doing some searching, this error seems to be related to a 5MB LocalStorage limit to private browsing on Safari iOS. No one mentions it being linked to an iOS app.

Even though it's a compiled iOS app, is it still restricted by such a limit?

Is there a way to increase this limit or do I need to look at another option for storing data.