Please be aware this app needs Bluetooth LE profile, so please check your Bluetooth adapter before starting the installation.
This is a sync app for the Casio GPR-B1000 watch, it uses Bluetooth LE connection to download GPS coordinates of the previously recorded routes from the watch and then the coordinates can be saved in GPX format.
Please check out the product demo on my YouTube channel: https://youtu.be/tDkYnCFTXb4