True players know leaving a tiny digital footprint is vital to their success. If Jessica sees you checking in at Wendy’s (the burger joint–or worse yet, Wendy’s, the non-burger joint), with Denise, your chances with Desiree will be marginalized. The Burner app ($1.99) for the iPhone gives you cover with a temporary additional number you can use to move stealthily in the night (or daytime) with. Call, text, or post to Facebook with the extra digits and you’ll totally be a nookie-nabbing secret agent.