There is no standard for such a system so as I didn't write this app I can't guess what method they used. My method is via web updates so your best place to ask this is the author or company that issued this app.
If the company is not performing most folk find a replacement app.
Find recipes for July 4 with these foodie apps
The Fourth of July means fireworks, fun and food. If you're planning on a barbecue this weekend, we've got the apps to help you find holiday-inspired recipes.