You have to buy the Premium options to:
include the the bow offset (distance from your phone to the bow) in the distance to line calculations
calculate the favored side of the line and display the advantage in meters.
You can buy subscribtions for 1 month, 3 months, 1 year or for life.
With the 1 month subscription, you can try these options for free during 7 days.
Subscriptions are automatically renewed on expiry.
You can cancel your subscription at any time in the Play Store either on the application page or from the “Manage your subscriptions” menu in of the Play Store.