Make that Zero customer support.Have had this for 8 months and it has blocked ZERO calls.The standard setup in the iPhone IOS or you can forward unknown callers to your voicemail.This works much better in my opinion than this app.I've had this app for eight months now, I bought a subscription for $20And I am letting it expire without renewal because there is no get your money back.I contacted them several times asking for help and I got nothing back.NothingVery disappointed and I feel like I was ripped off.The only function I ever used was looking up the numbers that I blocked myself to see what they were, and even that functions very weak.FYI I am running an iPhone 12 mini, and I keep it updated to the very latest iOS from Apple. Currently as of June 2024, 17.5.1I don't like leaving a negative feedback, but for $20 and no help and no refund path, I felt like I had to make and say something.I hope nobody else has lost $20.