If you don't have an account you can
sign up for one now.
You can also reset your
password if you've
You can enter your rating and any number of 5,4,3,2,1 star ratings and the app will tell you your new average. Just like LCarpenter said you can use it to see how many 5stars it will take you to recover your rating. You can also use it to see how many 1 star ratings you can recieve befor you are in danger of deactivation.
Theres some reading material on how to repair your rating in the app.
If you click the link in my original post there is a vid showing the app.