GymPact now lets you work out at home
Their app update (already available on iTunes and coming soon to Android) has a new option that uses your phone's accelerometer to check that you're moving. Move fast enough for 30mins within a 90min period and you've counted another workout for the week.
This is a great addition to GymPact's arsenal of fitness avoidance excuse-busters; Even if you're not a runner or a gym rat you can log your activity.