Smartphones are becoming more and more powerful, and many people will use them Nike+on should be used to track outdoor sports such as running and cycling. However, there is a problem with these GPS based motion management applications: GPS is not accurate (see Lei Feng.com《 。 Especially if you live in Shishi Forest, or you are playing such a straight up and down fitness exercise as jumping stairs, then the height may change rather than the position, and GPS is not reliable at this time.

To this end, a startup called EpicSesh launched a device called XensrCase, which can integrate your iPhone (iPhone 4, iPhone 4S and ）It becomes an accurate 3D motion sensor. It looks like an iPhone protective case from the outside, but it contains high-precision gyroscope, accelerometer and independent GPS module, which can be carried on the body. These sensors can collect more than 400 pieces of your movement data every second, and can accurately record your speed, movement distance and even parkour movements such as jumping and somersault. For extreme sports such as skiing, windsurfing or skydiving, you can clearly see the track of your movement in the air, or how high you jump, or how many circles you turn.

At present, the project is raising funds in Kickstarter. The project sponsor hopes to raise $100000 within one month. The first 100 users can buy this device with $150, and the price after 100 users is $170. The product is expected to be delivered in March next year.

This product has a video demonstration, and you can go to the 。