The Nike+iPod Sport Kit is an activity tracker device, developed by Nike, Inc., which measures and records the distance and pace of a walk or run.

The Nike+iPod consists of a small transmitter device attached to or embedded in a shoe, which communicates with either the Nike+ Sportband, or a receiver plugged into an iPod Nano.

The kit stores information such as the elapsed time of the workout, the distance traveled, pace, and calories burned by the individual.

The Sportband consists of two parts: a rubber holding strap which is worn around the wrist, and a receiver which resembles a USB key-disk.

As of August 2008 "Nike+iPod for the Gym" launched, allowing users to record their cardio workouts directly to their iPods.

The models of compatible cardio equipment include treadmills, stationary bicycles, stair climbers, ellipticals, and others such as Precor's Adaptive Motion Trainer.

Likewise, Nike no longer supported the Nike+ Connect software that transferred data to a NikePlus Profile or the Nike+ Fuel/FuelBand and Nike+ Move apps.

[10] The kit consists of two pieces: a piezoelectric sensor with a Nordic Semiconductor nRF2402 transmitter that is mounted under the inner sole of the shoe and a receiver that connects to the iPod.

They communicate using a 2.4 GHz wireless radio and use Nordic Semiconductor's "ShockBurst" network protocol.

No matter how the sensor is integrated with the user's shoes, care must be taken that it is firmly fixed in place and will not jerk around while in use, which would degrade the accuracy.

The user chooses a goal for the workout, which might be to cover a specific distance, or burn a number of calories, or work out for a specified time.

The Forward and Back buttons are unchanged, performing audio track skip and reverse functions.

While the Sports Kit can be used immediately after purchase, it will report more accurate results if it is calibrated before the first usage and then regularly afterwards.

Workout data is stored in XML files on the iPod, which has led some web and applications programmers to offer alternatives to the official Nike reports.

Forums were also added (which they refer to as "talk some trash"), allowing users to meet and challenge other runners, ask questions, and give feedback.

Recently, there have been several more additions to the Nike+ website including but not limited to: a challenge gallery where all user created challenges are viewable, the ability to name the route taken when running or walking, compatibility with the new iPod Nano (fifth generation), a distance club to view everyone's total distance traveled, fastest 5K et cetera.