Cartwheel is a new coupon app from Target. You can easily find coupons for lots of items and then just show the cashier your phone at checkout.
The downside is you have to sign up with your Facebook account and then it auto shares any coupons you select with your Facebook friends.
To disable this feature, or rather stop your friends from seeing your coupons, go to your Facebook Applications settings page, find ‘Cartwheel by Target’, click ‘Edit’ and change the visibility to ‘Only Me.’
Now this won’t stop Cartwheel from posting to your Facebook, but only you will be able to see those status posts. All of your friends won’t see a thing.