Review on 🚴 CYCPLUS M1: Waterproof ANT+ Wireless GPS Bike Computer with LCD Display and Backlight - Perfect for Tracking Speed and Distance on Your Bicycle by Fred Vazquez

I like the big display and the way the user interface works. However, there are some issues that you should be aware of. The thermometer is useless if the device is exposed to direct sunlight. I knew it was about 80F, he reported 107F. When connected to my Garmin HRM chest strap, this computer reported an odd heart rate. I cycled the computer several times until it started reporting reasonable numbers, after which it worked perfectly. As for GPS speed/distance, it seems to be more accurate at higher speeds but consistently underestimates speed and distance. The slope function is useless, a constant slope of 5% reports a slope between 2 and 12%. The XOSS application is a major security concern. It has access to EVERYTHING on your phone. If I wrote spyware, I would. In general, I think that the firmware is of poor quality, as if somehow it works, but did not test much. I would like access to the source code, there are a few things I would fix.