Retinoids, antioxidants, and of course, lots of sunscreen: We take our goal of having great skin years down the road seriously. So when an app comes along and promises to tell us what we’ll look like 20, 30, even 40 years from now, well, like everyone else who’s ever stayed up late using one of those questionable “see how you’d look in this celebrity’s hair” tools, we were skeptical…

It’s not that we don’t know we need to work out; it’s just that the alternatives (eating, sleeping, bingeing Gilmore Girls episodes from the couch) are so much easier. Between holding down full-time jobs, taking care of kids, doing all of the boring, behind-the-scenes grown-up stuff (we see you, taxes), and attempting to have a social life, it’s not surprising that so many Americans find it hard to make the time or work up the motivation to do an hour of exercise each day…