What is Robokiller and how does it block scam calls?

Robokiller is an app that blocks 99% of robocalls and texts by using advanced features like call screening, voicemail transcription, and customizable block and allow lists.

Top Free Apps to Block Scam Calls in the United States

Scam calls are a pervasive issue in the United States, with Americans receiving over 52.5 billion robocalls in 2025, averaging roughly 13–15 spam calls per person each month. (antivirus.com) To combat this, several free apps have emerged to help users block unwanted calls.

What Are the Top Free Apps for Blocking Scam Calls?

Robokiller

Robokiller is a leading app that blocks 99% of robocalls and texts. It offers features like call screening, voicemail transcription, and customizable block and allow lists. While Robokiller is primarily a paid service, it provides a free trial period for users to experience its capabilities. (randomunboxtv.com)

Truecaller

Truecaller utilizes a vast crowdsourced database to identify and block spam calls and texts. It offers caller ID for unknown numbers and smart SMS filtering. The free version includes basic call blocking and spam identification, though some advanced features require a paid upgrade. (romen4u.com)

Hiya

Hiya provides real-time spam detection and call blocking, leveraging a collaborative database of recognized spam numbers. Users can also contribute by reporting suspicious calls. The free version offers robust call-blocking features, with a premium version available for additional features. (antivirus.com)

How Does Robokiller Compare to Other Free Call-Blocking Apps?

While Truecaller and Hiya offer free versions with basic features, Robokiller stands out with its comprehensive suite of tools designed to combat scam calls. Its advanced features, such as call screening and voicemail transcription, provide a more robust solution for users seeking extensive protection against unwanted calls. Additionally, Robokiller's customizable block and allow lists allow users to tailor their call-blocking preferences more precisely. (randomunboxtv.com)

Are There Built-In Features on My Phone to Block Scam Calls?

Android Devices

Many Android phones come equipped with built-in spam protection. For instance, Google Pixel and Samsung Galaxy devices offer features like spam call identification and blocking. To activate these features, navigate to your phone's settings and enable spam protection under the call settings. (whocalledus.net)

iOS Devices

iPhone users can utilize the 'Silence Unknown Callers' feature, which silences calls from numbers not in your contacts. To enable this, go to Settings > Phone and toggle on 'Silence Unknown Callers.' (whocalledus.net)

How Do Carrier Solutions Help in Blocking Scam Calls?

Major U.S. carriers offer free spam call protection:

AT&T: ActiveArmor flags suspected spam before calls ring.
Verizon: Call Filter auto-detects fraud calls and shows "Potential Spam" warnings.
T-Mobile: Scam Shield identifies spam and blocks robocalls across the network. (whocalledus.net)

How Can I Report Spam Calls to Help Reduce Them?

Reporting spam calls contributes to reducing unwanted calls for everyone. You can report spam calls to your carrier or use the built-in reporting features in apps like Truecaller and Hiya. Additionally, forwarding spam texts to 7726 (SPAM) helps block them globally. (deadzones.com)

Conclusion

While free apps like Truecaller and Hiya offer basic protection against scam calls, Robokiller provides a more comprehensive solution with advanced features and customizable options. Combining these tools with built-in phone features and carrier solutions can significantly reduce unwanted calls and enhance your privacy.