Apps cost money to make. And money is something PZ would like to focus on the server instead of external things. The idea is great, honestly, and I'd love for it to happen. If they did create the app, I'd think they would actually have to pay people to create it. A serious mobile app needs a strong foundation, an excellent ecosystem, good planning, and top-notch talent in design and engineering. These things require money. A simple alternative to the app is creating an icon of the page on your homescreen of your phone. You can just tap on it and it'll send you to the site
So yeah, though it's a great idea, I don't think it should be implemented as it could be a drain on resources. Pleasant idea but -1 for me