Also, see their Facebook. They publicly post GPS location of winners, together with StreetView. Is that stated in the app? It can be a privacy concern.
com.carrotpop.www.smth E/AndroidRuntime: FATAL EXCEPTION: main
java.lang.IllegalArgumentException: requested provider gps doesn't exisit
at android.os.Parcel.readException(Parcel.java:1429)
at android.os.Parcel.readException(Parcel.java:1379)
at android.location.ILocationManager$Stub$Proxy.requestLocationUpdates(ILocationManager.java:646)
at android.location.LocationManager._requestLocationUpdates(LocationManager.java:660)
at android.location.LocationManager.requestLocationUpdates(LocationManager.java:482)
at com.ansca.corona.CoronaSensorManager$1.run(CoronaSensorManager.java:163)
at android.os.Handler.handleCallback(Handler.java:615)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4745)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
at dalvik.system.NativeStart.main(Native Method)
man, you've tried it with tablet! How big your tablet is? I think they should appropriately rescale scores for the weight and aerodynamics of the object being thrown.
aerodynamic is calculatable from deceleration which is sum of gravitational "g" plus aerodynamic "Cx" multiplied by square proportional to the speed. The weight is known for a given model of device.
Also, see their Facebook. They publicly post GPS location of winners, together with StreetView. Is that stated in the app? It can be a privacy concern.