On Android, yes! All the data that you collect with our app can be saved on your phone and exported for your personal use. To do so, click on the Menu button (the three dots on the top right corner), then choose “Settings”. On the “Data collection” settings, you will see the following option: “Use this if you want to keep all the data collected on your SD card so you can use it for your own analysis”. By ticking the box next to it, all the data collected by the app will be saved as a .csv file in the opensignal folder on your SD card.
On iPhone, you can only save and export your Speedtests (view question in the Speedtest section).