Download the pocketVNA software from here.
Connect the PocketVNA to your computer. Your computer (Windows, MacOS, Linux) will automatically recognize the hardware. You might see some installation information on Windows computers which you can ignore.
Copy the file into a folder of your choice and unzip it. You can copy the unzipped file to any folder on your computer. After starting the software you will see "connected to PocketVNA 1.x on port …" information or similar on the lower right side of the software. Your system is set up and ready for measurement.
Proceed to the quick start section to start your first measurement.