No Bluetooth speed sensor ?
No connected home trainer ?
No ANT+ dongle ?
want to connect to your online virtual cycling platform ?

Install app on a spare device and use your android phone as a sensor !

- Using Android accelerometer sensor : place it horizontally just on your thigh or vertically in your socket or tight it to the lower part of your leg. The app detects the orientation automatically. And adjust the distance you travel when doing one round of crank (default set to race bike, 700x25x tire 50x17 bracket

OR

- Using Android proximity sensor : place it in front of your (raised) back wheel, mask part of the wheel and there you go.



On your main phone/tablet install your favorite virtual cycling app, spawn device detection for speed sensor.


Warning :
- Bluetooth Cycling Speed Sensor uses proximity or accelerometer sensors do detect spinning wheel. Some device might have issues with it. So it comes with no warranty at all.
- Warning; the measuring device must be placed in front of bike wheel in proximity mode
- Warning : Displayed speed is indicative and based on 720x25c tire size
- This app is a "sensor" app e.g. it is meant to be used with a client app (online virtual cycling app, or bluetooth speedometer).