Is there a hack to clearing the webapp cache when linking to an external website from an app

Is it possible to clear the cache/cookies when sending a user to an external website from an app?

Our workflow has our users making all payments on a webapp I’ve built (in Adalo, obviously, which is connected to the same database as the app), they click an external link and are taken to our single page payment gateway, however what I’d like to do is clear the cache/cookies when they do this.

The reason for wanting to do this is on a number of occasions during the testing of our app the webapp doesn’t load correctly as it’s referencing old data from a previous session…