LA Computer Company offers the 3Bays Golf Putting Analyzer for iOS, model no. MX-G103-iOS, for $165 plus $6.83 for shipping. That's the lowest total price we could find by $27. This device attaches to the end of your golf club and uses motion sensors to digitize your swing motion and instantly send the data to your iPhone, iPod Touch, or iPad. It includes a USB cable and leather case.