I tried the 7 day free trial and being a realestate agent it only took me a couple of hours to realize it was killing my business. Not all my clients are in my contacts yet. I deleted the app and cancelled the subscription before the trial was over. The app will not remove from my phone and it continues to stop my calls. I have tried contacting support but it goes to ATT who cannot fix it, I was told to contact Robokiller support...useless. I am pissed and this company should be removed from IPhone app store until it can correct its issues. User's recommendation: DONT USE ROBOKILLER!