Question: Is there a tool that can record and block harassing calls, and provide evidence if needed?

If you're looking for a service to record and block harassing calls, and to provide evidence if you need to, TrapCall is a good option. It can unmask blocked calls, block spam calls automatically, and record incoming calls for evidence. It also has a Privacy Lock feature that requires unknown callers to reveal themselves before connecting. TrapCall works with major US carriers and offers a free 7-day trial.

Another good option is Robokiller, an AI-powered app that blocks more than 99% of spam calls and texts. It has customizable block lists, real-time call screening and the ability to record calls for evidence. Robokiller's Answer Bots keep scammers busy, and it integrates with major carriers in the US and Canada.

If you want a more complete solution, check out Hiya. The company's platform has more advanced spam protection tools, including self-learning protection systems and caller scoring. Hiya also offers auto-blocking and reverse phone number lookup for Android and iOS users. Its Adaptive AI continually improves its ability to block unwanted calls.

Last, Whoscall offers real-time caller ID and automated blocking of spam calls. It has an AI-powered alert system and a massive 2.6 billion phone number database for identification. The app is available for iOS and Android devices, with a free version and a premium subscription for more features.