You’ll need the FreeStyle LibreLink App (FreeStyle Libre 3 App in Germany, Austria and Switzerland) to collect data, from the sensor, and the HI app to analyze the data and get insights, scores, and also to log events.
Remember to scan your Libre 2 sensor at least every 8 hours to make sure your data is not lost! The Libre 3 (which you are using if you are based in Germany, Austria or Switzerland) will synchronize automatically.