Where can I find the Fonn Construction app? Gabriela Wasylków June 03, 2019 13:43 Updated Follow Web 1. Go to www.app.fonn.io log into your account or sign up Android 1. Open Google play and search for Fonn, then install the app iPhone 1. Search for Fonn in the App Store and press install button Related articles How much does Fonn cost? Fonn Training PDF Comments 0 comments Please sign in to leave a comment.