What are the top free apps to block spam calls in the U.S.?

Top free apps include Hiya, Truecaller, Mr. Number, and T-Mobile Scam Shield, each offering unique features to block spam calls.

Effective Free Apps to Block Repeat Spam Calls in the U.S.

Spam calls are a persistent nuisance, with Americans receiving over 52.5 billion robocalls in 2025 alone. (antivirus.com) Fortunately, several free applications can help mitigate this issue. Below, we explore some of the most effective free apps available in the U.S., highlighting their features and how they compare to Robokiller, a market-leading solution.

What Are the Top Free Apps to Block Spam Calls?

1. Hiya

Hiya offers a free app that utilizes a collaborative database of recognized spam numbers to block robocalls and spam calls. Users can also contribute by reporting suspicious calls. With a global user base of 100 million and over 10 billion blocked robocalls, Hiya is a reliable choice. (antivirus.com)

2. Truecaller

Truecaller provides a free app that not only blocks robocalls and spam calls but also offers caller ID, spam detection, and call recording features. It boasts a worldwide user count of 250 million and an impressive record of blocking 25 billion robocalls. (antivirus.com)

3. Mr. Number

Mr. Number is a free app that effectively halts robocalls and spam calls, and it additionally empowers users to block specific numbers. With a global user base exceeding 10 million and a remarkable tally of over 1 billion blocked robocalls, it proves its efficiency. (antivirus.com)

4. T-Mobile Scam Shield

T-Mobile Scam Shield is a free app that identifies and blocks spam calls across the network. It offers Scam Likely warnings on caller ID and provides additional features to protect users from unwanted calls. (appshunter.io)

How Does Robokiller Compare to These Free Apps?

While the free apps mentioned above offer valuable features, Robokiller provides a comprehensive solution with advanced capabilities:

Advanced Call Blocking: Robokiller employs diverse methods, including blacklisting, whitelisting, and identification, to prevent robocalls and spam calls. (antivirus.com)
Answer Bots: Beyond call blocking, Robokiller offers versatile features like call screening, forwarding, and voicemail transcription. (antivirus.com)
High Efficacy: Robokiller is known for its high efficacy in blocking spam calls, with users reporting a significant reduction in unwanted calls. (antivirus.com)

How Can I Block Spam Calls for Free on My Phone?

For iPhone Users

Silence Unknown Callers: Go to Settings > Phone, then enable "Silence Unknown Callers" to automatically silence calls from numbers not in your contacts. (koat.com)

For Android Users

Google Phone App: Open the Phone app, tap the three-dot menu, go to Settings > Spam and Call Screen, and enable "Filter spam calls" to automatically block them. (whocalledus.net)

Are There Any Additional Tips to Prevent Spam Calls?

Register with the National Do Not Call Registry: Visit donotcall.gov to register your number, which can reduce unsolicited calls. (whocalledus.net)
Use Carrier Services: Many carriers offer free spam call protection. For example, AT&T's ActiveArmor, Verizon's Call Filter, and T-Mobile's Scam Shield provide free tools to help manage and block spam calls. (whocalledus.net)

Conclusion

While free apps like Hiya, Truecaller, Mr. Number, and T-Mobile Scam Shield offer valuable features to block spam calls, Robokiller stands out with its comprehensive and advanced capabilities. By combining built-in phone features, carrier services, and third-party apps, you can significantly reduce the number of spam calls you receive.