Apps that Challenge Here are a few apps that require you to do more than react or repost. Do you use apps like these? Share your challenging app choices. By Stephany Tlalka April 2, 2013 Calm Illustration by Gavin Potenza Life isn’t just a click-through, so why should your apps be? The fact is, few prompt us to do muchUnlock this article for FREE. Keep Reading Log in to your Mindful account for uninterrupted access.