Everyone, literally, everyone who downloads a running app have one common request, tracking metrics. How the app motivates you is secondary. People want to be able to track their progress. As a long time user of Zombies Run! I have grown to love the zombie link. Unfortunately, this link does not exist with this app forcing users to create a new account. Its a common theme in the reviews and on the six to start support site. Hopefully the company can get back to the basics and fix this basic need for the loyal customer base.
Dave E in CV about Zombies, Run! 5k Training, v1.2.2