This tool seems no longer maintained and support is completely unresponsive as of this moment. ReplyUp asks your credit card details to start a trial, doesn't clearly indicate that you will be charged automatically after the trial, and then doesn't give an option to change/remove your credit card details or delete your account. This means you have to block your credit card to get rid of ReplyUp's monthly charges. After much hassle I've been able to track down founder Ben Cole on Skype but after a first response explaining he would take care of it within the next hour, I never heard of him again. In my opinion, this is a very reckless way of doing business and extremely harmful to one's reputation as an entrepreneur.
Easy to sign up
Impossible to get rid of, see details below