Follow along with the video below to see how to install our site as a web app on your home screen.
Note: this_feature_currently_requires_accessing_site_using_safari
Tried it twice through the years - was a total bomb and I got some insults for doing it, too. My suggestion would be to give something away when someone donates - subscription, report, ebook ... something along those lines so people actually feel they're getting something for their donation.