← Back to Blog
TipsMay 6, 2026

Best Free Trial Apps to Block Telemarketing Calls in the U.S.

By The Robokiller Team

Best Free Trial Apps to Block Telemarketing Calls in the U.S.

Telemarketing calls are a persistent nuisance, but fortunately, several apps offer free trials to help you block these unwanted interruptions. Here's a curated list of top-rated options:

1. Robokiller

Robokiller is renowned for its advanced spam call blocking capabilities. It uses a vast database to identify and block robocalls, telemarketers, and scammers. The app also features humorous pre-recorded messages that engage telemarketers, wasting their time and reducing future calls. Robokiller offers a 7-day free trial, allowing users to experience its full range of features before committing to a subscription.

2. Hiya

Hiya provides real-time alerts for suspected spam calls and automatically blocks high-risk callers. It also offers a personal block list and the ability to report spam numbers. The app is free to download and use, with additional features available through in-app purchases.

3. Verizon Call Filter

Verizon's Call Filter app screens incoming calls, identifies suspected spam, and automatically blocks high-risk callers. It also allows users to report spam numbers and adjust spam filter settings. Verizon offers a 15-day free trial for Call Filter Plus, which includes additional features like Caller ID and blocking neighborhoods. (apps.apple.com)

4. Call Guardian by UScellular

Call Guardian alerts users to potential spam, fraud, or robocalls with varying risk levels. It offers a personal spam list and the ability to report spam numbers. The free version provides basic features, while Call Guardian Premium, at $3.99 per month, includes additional functionalities like blocking nuisance calls and neighborhood spoofing. (uscellular.com)

5. RealCall

RealCall uses AI algorithms to detect and block spam calls and messages. It offers a reverse phone lookup service and customized answer bots for unwanted calls. The app is free to download and use, with additional features available through in-app purchases. (en.wikipedia.org)

6. Call Blocker by Thumbtel

Call Blocker by Thumbtel allows users to block spam calls and prevent unwanted voicemails. It offers a 30-day free trial of all features, after which users can choose to subscribe. (thumbtel.com)

7. Robo Spam Text & Call Blocker

This app automatically filters out spam, telemarketing, and robocalls. It includes an extensive spam list, neighbor spoofing protection, and allows manual blocking and whitelisting. The app offers a free trial period, after which a subscription is required. (apprecs.com)

8. AT&T ActiveArmor

AT&T's ActiveArmor app provides spam call blocking and alerts for potential fraud. The free version offers basic features, while ActiveArmor Advanced, at $3.99 per month, includes additional functionalities like blocking nuisance calls and neighborhood spoofing. (assets.bouldercounty.gov)

Conclusion

While all these apps offer free trials to help you block telemarketing calls, Robokiller stands out with its unique approach of engaging telemarketers with humorous responses, effectively wasting their time and reducing future calls. Its comprehensive features and user-friendly interface make it a top choice for many users seeking to reclaim their privacy.

Before choosing an app, consider the specific features that best suit your needs, such as automatic blocking, real-time alerts, or the ability to report spam numbers. Most of these apps are available for both iOS and Android devices, ensuring broad accessibility.

By utilizing these free trial apps, you can take proactive steps to minimize unwanted telemarketing calls and enjoy a more peaceful phone experience.

Frequently Asked Questions

Related articles

Live life spam-call-free.

Robokiller blocks 99% of spam calls and texts so you can take your phone back.

Try free for 7 days