Most fitness apps do a terrible job of trends and tracking on a season or year to date basis. There is certainly room for improvement there.
I use a normal scale and weigh myself each morning, I manually enter that data into my Fitbit app.
I also wear my Fitbit whenever I train/play table tennis to monitor my heart rate and estimate calories burned.
Shortcuts on the iPhone to track my weight and water intake.
Most fitness apps do a terrible job of trends and tracking on a season or year to date basis. There is certainly room for improvement there.