Skeptical Investigation

A Music App That Knows Your Jogging Habits

None We’re lovers. You know that. But every now and again, something comes across our desks that just seems... suspicious. Because of the tremendous material upside to all our lives if these claims pan out, we at times put ourselves in harm’s way to investigate. Albeit skeptically.

We call it: Skeptical Investigation. (Trademark pending.)

A new iPhone app called Marx Runner claims to let you create custom songs that automatically change tempo based on the speed and intensity of your morning jog. When you speed up, the beat speeds up and each track takes on a new life depending on your workout. So we laced up our cross-training brogues and...

After providing our most Prefontaineian investigator with a protein bar, some earbuds and a 1K road map, we sat back and awaited the results.

Upon launching the app, our researcher was presented with a screen resembling a cross between a digital stopwatch and a virtual DJ booth. There were options. Options to add or remove drums. To tweak vocals and sound effects. To insert Apollo Creed’s voice talking smack about how bad we are at jogging. (Not really, but that would be kind of cool.)

Then some running happened...

As advertised, it worked. As our researcher’s speed increased, so too did the rhythm of each song. The caveat: the songs are kind of annoying. And repetitive. And overall, it was a bit more work than we would’ve liked to take on.

Then again, so was jogging...

Elsewhere on the Daddy

More Gear