I'm the founder of CallStop: https://apps.apple.com/us/app/callstop/id1455892856

CallStop allows you to:

- Block 100% of robocalls on your current number, using your contacts as a whitelist

- Effortlessly email call invites to an any email (that can be joined in one tap, the PIN is embedded), where the recipient can only call you starting 5 minutes before the meeting start and up until 5 minutes after the meeting end

- Pause call filtering and have it automatically resume after a certain time

- Accept whitelist requests to join your whitelist, and receive notes from the callers prior to accepting

- Specify PINs you can give to loved ones or groups to reach you from unknown numbers.

- Get a second phone number with which you can give out in lieu of your primary.

CallStop is a productivity tool that lets you better manage your time and who can reach you.

If you're expecting a call from a business from an unknown number, or want to limit a salesperson from calling you more than once, CallStop is perfect for managing these interactions.