You may have noticed that the FreeStyle Libre logbook sometimes displays different values compared to your Vively graph.

This happens because the FreeStyle Libre logbook can occasionally show incorrect values. FreeStyle Libre has an algorithm that detects these discrepancies and updates the data in its graph accordingly.

If you notice differences, it's likely that the logbook data is incorrect, while the Libre graph data is accurate. Since Vively pulls data from the Libre graph, your Vively data and graph should also be correct.