I get spam robocalls on my iPhone and have no way to block them.
+1
Indeed. Somehow I've ended up on a number of phone spammer databases, such that I go through periods of getting 5+ calls per day. (Yes, of course I'm on the national do-not-call list and it's illegal to contact cell phones this way.) On Verizon you can block certain numbers (including "unkown"), though I believe it costs an additional 5$ a month. For the last 5 years or so I've been in the habit of not answering any call from a number not on my contact list, but I'd love a good (cheap) way to block spam calls. (And there aren't any good apps for this... I'm guessing Apple doesn't provide an API to actual phone functionality?)
If they have consistent caller ID (big if, I know, but it happens, and it still works if they use several numbers, as long as they're not totally random) then you can "block" them simply by putting them into a contact that has a silent ring tone and a vibration pattern of "None". They'll still show up on the screen when they call (and potentially interrupt you if you happened to be using something on the phone) but it's way less annoying.
Just thought I'd mention it in case you didn't know about that strategy and it's helpful for you.
It's annoying -- the best thing I've found is to use something like Google Voice (or run your own, build it with plivo or twilio), run calls through that, and set your default ringtone to silent/no vibrate, while setting a real ringtone and vibration for calls from the gateway. Unfortunately this means not getting caller-ID for callers.
+1
Indeed. Somehow I've ended up on a number of phone spammer databases, such that I go through periods of getting 5+ calls per day. (Yes, of course I'm on the national do-not-call list and it's illegal to contact cell phones this way.) On Verizon you can block certain numbers (including "unkown"), though I believe it costs an additional 5$ a month. For the last 5 years or so I've been in the habit of not answering any call from a number not on my contact list, but I'd love a good (cheap) way to block spam calls. (And there aren't any good apps for this... I'm guessing Apple doesn't provide an API to actual phone functionality?)