Runtastic App Opinions

Hi. I have been running for a while but mostly at the gym. I downloaded Runtastic for a 5k but it seemed to lag a bit. Does everyone's do this? Also, is the upgrade version worth it and better with the lagging? The reason I run at the gym is because I am terrible at finding a route and just going, which the upgraded version seems to have a guided route option. I just want opinions on the app and if it's good for someone who runs at the gym.

Joanna