Didn’t work!
Response from developer
We try to make this clear in the app, but any GIF images that have already been viewed will still be visible, because they are already downloaded and cached on the device. However, the app will block downloading any new GIFs. So, to test if it is working, you'll need to search for a brand new phrase. The only way we know how to remove GIFs that have already been viewed is to factory reset the phone, and then install the app right away. We have heard from several parents who have done this successfully. If this wasn't the problem you were having, please reach out to us at https://gertrude.app/contact - we'd be happy to dig in and figure out what went wrong. Really sorry you're frustrated!