No Data will be saved on any server. The complete analysing process happens locally on your device!
To get your data you can follow the steps on this page. For the file format you can select either of the two options.
After sending the request it normally takes 2-4 days till you can download the zip file. Save the file on your device. After you saved the file you can go to the starting page, click on "Already got your data?" and upload the zip file.