Yes there is a subscription service that updates the database quarterly for VFR and monthly for IFR or you can just buy a one off if you need it. I have the monthly service as I am running the IFR version.
You subscribe to the weather service on a yearly subscription which is about 80 quid.
The weather service is superb and the app uses it to do the wind calcs etc for you.
I also have Jeppview which is the electronic airways and approach manuals which also integrates into Flightstar.
I can plan a flight from a-b VFR or airways and have the airfield and instrument plates all in one application and print it all out to kneeboard size in colour.
It is VERY good software.