From the team that made Burner, an iOS app that screens out all calls, allowing only a user-designated whitelist to ring through.

Looks fantastic! Could this be made available in the Canadian App Store by chance?

I'm the CTO at ad-hoc labs. Thanks for the feedback! We do plan to make Firewall available in the Canadian app store soon. We have to go through the Canadian wireless carriers and build out the support for them one at a time.