A new app called ICEBlock alerts users about nearby Immigration and Customs Enforcement (ICE) activity by allowing them to report sightings of ICE officers. The app has quickly gained popularity on the Apple App Store and is designed to track location and send push notifications when ICE is reported within a five-mile radius. Users can report sightings anonymously, with reports deleted within four hours, and can only report once every five minutes. The app developer, Joshua Aaron, created it to protect vulnerable communities and insists it is not intended to obstruct law enforcement. Critics, including U.S. Secretary of Homeland Security Kristi Noem, argue that the app undermines law enforcement and endangers ICE officers. Aaron has faced criticism for not making the app available on Android due to concerns about user anonymity. He emphasizes that the app is legal and protected under the First Amendment.