Hello @Martin_Krajcir1
When an app is accessed from multiple locations (which is indicated by multiple IP Addresses) it is an indication of the app being in production. The Springboard plan is intended only for development and the SuperScaling option disables multiple location access.
And you are right the API Calls are unlimited on the Springboard plan and it is limited by IP addresses
You can see that information on the pricing screen:
Regards, Vlad