Free Experience (Free Exp) in WoWs Blitz can be used to research new ships and is not bound by nation or tier.
You can earn Free Exp. in missions and from matches. Also, normal battle experience can be exchanged to Free Exp using gold. To transfer experience from a ship to free experience you have to meet the following requirements:
- The ship has to be upgraded to Elite Ship status. You can do this in the armory using blueprints
- All the research on that ship has to be completed. Sometimes this means more than one ship has to be researched.
- You need to have gold to exchange Exp to Free Exp.
When you meet all these requirements, you should see the ship in the Convert Free Exp window.