If you’ve got an Android device, be sure to check out the “Mystery _hack” app available now on the Google Play Story. It allows you to decode all the hidden messages within Gravity Falls and make your own! It’s actively being updated so be sure to rate & review it as well as contact the developer with ideas on improving it! An iOS version is on it’s way as well!
Just a thing I quickly helped design.
Can’t wait for it to hit the App Store! (iPhone user)