Yes, there are frees plans and it includes:
+ FREE PLAN
• Integrate your UPS/Parcel Pro account into your store, and automate your shipments with insurance.
• Integrate your RapNet account into your store and list your RapNet inventory easily.
+ FREE PLAN FOR DEVELOPMENT STORES
• The app is fully free for development stores, and after the online store has been published you still have 14 days free. If you want to start with a development store, starts here.
+ FREE TRIAL
• Try for 14 days for free here.