Planned workouts from the past in intervals don’t count for Fitness parameters. If the day passes by and you have done nothing, it doesn’t influence your PMC chart.
If you don’t like that passed workouts are displayed, you can toggle that in the calendar options. On the day itself you will see both, but the next day, you won’t see the planned workout anymore.
You can sync to dropbox. Both apps support that and it’s probbaly easier then Strava. Main advantage is that your data is safe in dropbox. If you cancel Strava account, david has to to remove all your data from intervals per their user agreement.