IIFC, they just have different expiration dates. Not an issue as long as you keep renewing both.
I have free WingX Pro7, Aerovie, and FltPlan Go. I still choose to pay $129.99 for iFly GPS VFR, IFR, and Multi-Platform Add-On. That's how good it is. If you become a Beta tester, Brian is terrific in making continuous improvements and upgrades and is very responsive to customer suggestions (as long as they are widely desirable).