There are on-line viewer https://www.phantomhelp.com/LogViewer/Upload/Here. This is for the Go4 App flight record file .Txt. So this is not always all the flight if there are disconnections.
Alors CsvView can plot. DAT file recorded in the Spark where all info are available.
See thread How to view .DAT file flight log
for CsvView which is the best as it can plot Go app. Txt flight record and more importantly the. DAT file that is located in the Spark.