Nike + iPod Sensor

The Nike + iPod Sensor, or Nike+ Sensor, is a wireless fitness pedometer for early iOS devices that was marketed by and Apple Computer. This motion sensor could be placed inside the sole of a shoe to count the user's steps.

History
The Nike + iPod Sensor was first introduced in 2006 as part of the Nike + iPod Sport Kit that also included a wireless receiver to be attached to the 30-pin dock connector of early iPod nano models. The kit was superseded on September 9, 2009 by the 5th-generation iPod nano which contained its own accelerometer for use as a, though it did still support the sensor.

The Nike + iPod Sensor could be purchased separately for the iPhone 3G S through 5 S, which do not require a wireless receiver. The iPhone 6 (and 6 Plus and later) contained its own Apple motion coprocessor and did not support the Nike+ Sensor. Users have complained about the sensor's accuracy and battery life, which only lasts about a year and is not designed to be user-replaceable. The sensor was phased out in 2014.

All current Apple Watch, iPhone, and iPod touch models contain their own accelerometers, negating the need for a separate accessory. Nike's software functionality on iOS devices has been carried over into the Nike Run Club and Nike Training Club apps.

Usage outside of Nike+ footwear
It is possible to use the Nike + iPod Sensor with footware outside of the product line by using a combination of tape, velcro, and / or the shoe's laces to secure the sensor to the shoe. It is advised to keep the sensor as horizontal as possible. Some third parties also produced pouches for the sensor.

Supported Apple devices
No wireless receiver required, except where noted:
 * iPhone 3GS
 * iPhone 4 / 4 S
 * iPhone 5 / 5C / 5 S
 * iPod nano (1st, 2nd, 3rd, 4th, 6th generation) - requires wireless receiver from the Nike + iPod Sport Kit.
 * iPod nano (5th generation) - includes its own built-in pedometer, but still supports the Nike + iPod Sport Kit.
 * iPod nano (7th generation)
 * iPod touch (2nd, 3rd, 4th, 5th generation)