Its not needed to go premium, because you can unlock a mission a week but I couldnt help it! I needed more. depending on the weather or if Im feeling up to it, I aim for two or three jogs a week.
Theres so much to offer and I havent even gotten through season one yet, since Ive done side missions and marathon training.
Ive also fallen in love with Sam, so... Theres that! XD
Highly recommend.
SamWhipps about ZRX: Zombies Run + Marvel Move, v4.4.1