When I signed in, Zwift said I would get a 7day trial but it seems I get only 25km.
Am I doing something wrong or is it only 25km over the 7days.
This link explains trial stuff better than I could 
https://support.zwift.com/hc/en-us/articles/210210043-Zwift-Free-Trial
Hi Pall,
It appears that you’re using an iOS device to run Zwift, so this free trial is a little different from the trial provided on PC/Mac. When you first sign up, you will receive 25km to test out Zwift. You will only receive the additional 7 day free trial once you become a member (you will not be charged until the 7 day trial is up).
I recommend looking over the link Paul provided, as it helps explain how the trials work for each platform :)
Ride On!