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RoboKiller

robokiller.com

From $2.67/mo Free plan WebiOSAndroidAPI
Visit robokiller.com
Spec score 8.8 #2 of 41 in Spam Call Blocking Apps

What it is

RoboKiller is an Android and iOS app that blocks spam calls and filters spam texts. Its call-blocking algorithm analyzes call metadata in less than a millisecond and blocks calls it identifies as spam before they reach the phone. Audio fingerprinting compares robocall recordings against a database of more than 1.5 billion processed phone numbers and millions of audio fingerprints. RoboKiller says its technology is 99% effective at stopping spam calls. Text filtering uses block and allow lists, number reputation, and content analysis; the company says messages are never stored or shared. The free version includes a daily-updated blacklist, blocked-call notifications, weekly insights, spam reporting, and Spam Patrol. Answer Bots, Call Screening, and Personal Data Protection require a paid plan. Answer Bots play prerecorded messages to spam callers, while Call Screening asks unknown callers for their name and reason for calling. Both features require a carrier and plan that support Conditional Call Forwarding. Listed paid options include $4.99 a month, $31.99 a year, and $39.99 a year; a 7-day trial is also listed.

Spec sheet

What it does
RoboKiller is a mobile service that blocks spam calls and texts using AI, machine learning, caller data and audio fingerprinting.Read 15 Oct 2026 · play.google.com
Purpose
Robokiller blocks spam calls and texts and promotes a spam-call-free phone experience.Read 1 Oct 2026 · robokiller.com
API
Teltech announced the Call Confidence API in May 2021 to provide businesses with RoboKiller’s machine-learning reputation and blocking signals for phone numbers.Read 15 Oct 2026 · ir.iac.com
Support
Robokiller provides dedicated integration resources during implementation plus ongoing support, reporting, and relationship-management resources for business customers.Read 1 Oct 2026 · robokiller.com
AI call analysis
Its predictive call-blocking algorithm analyzes call metadata in less than a millisecond and blocks calls identified as spam before they reach the phone.Read 1 Oct 2026 · robokiller.com
Answer Bots
Answer Bots send callers to prerecorded recordings intended to occupy and deter scammers, and users can listen to the resulting calls.Read 15 Oct 2026 · play.google.com
API capabilities
The announced enterprise API uses blocklists, audio fingerprinting, call-data analysis, call screening and customer feedback to support robocall mitigation and STIR/SHAKEN programs.Read 15 Oct 2026 · ir.iac.com
API documentation
A public ReDoc endpoint exists for the Enterprise API, but the currently linked production specification returns a 404 error.Read 15 Oct 2026 · enterprise-api.robokiller.com
Audio fingerprinting
Patented audio fingerprinting compares robocall recordings in real time against a database containing more than 1.5 billion processed phone numbers and millions of audio fingerprints.Read 1 Oct 2026 · robokiller.com
Call Screening
Call Screening asks unknown callers to identify themselves and provides a live transcription while the phone is ringing.Read 15 Oct 2026 · play.google.com
Carrier compatibility
The help center says the service works with all carriers in the United States and Canada, while full Answer Bot and screening features require conditional call forwarding.Read 15 Oct 2026 · support.robokiller.com
Carrier requirement
Answer Bots and Call Screening require a carrier and plan that support Conditional Call Forwarding.Read 1 Oct 2026 · support.robokiller.com
Company headquarters and founding
LinkedIn lists Teltech in New York, New York, founded in 2005.Read 15 Oct 2026 · linkedin.com
Company legal name
Crunchbase identifies the legal name as Teltech Systems, Inc.Read 15 Oct 2026 · crunchbase.com
Company size
Crunchbase lists RoboKiller at 51–100 employees, while LinkedIn’s Teltech page displays one employee.Read 15 Oct 2026 · crunchbase.com
Documentation and support
The help center is organized into subscriptions, how-to guides and troubleshooting, with articles covering activation, forwarding, voicemail, blocking and Personal Data Protection.Read 15 Oct 2026 · support.robokiller.com
Enterprise coverage
RoboKiller Enterprise markets protection for mobile, landline and text communications and says its predictive system can identify threats in under 0.01 second.Read 15 Oct 2026 · robokiller.com
Enterprise integrations
Robokiller offers business integrations with SIP and HTTP options and public- or private-cloud deployment.Read 1 Oct 2026 · robokiller.com
Free version limits
The free version includes a daily-updated blacklist, blocked-call notifications, weekly insights, spam reporting, and Spam Patrol, while Answer Bots, Call Screening, and Personal Data Protection require a paid plan.Read 1 Oct 2026 · support.robokiller.com
Launch history
The 2021 API announcement states RoboKiller launched in 2017 and had helped millions of Americans avoid approximately $150 million in phone-scam losses by then.Read 15 Oct 2026 · ir.iac.com
Licence
RoboKiller describes patented and proprietary blocking technology and publishes no open-source code or open-source licence.Read 15 Oct 2026 · apps.apple.com
Limit: Android messaging issues
Google Play reviews mention freezes, slow performance and inability to view or send texts reliably on some Samsung phones.Read 15 Oct 2026 · play.google.com
Limit: billing and cancellation
Trustpilot reviewers repeatedly allege unexpected renewals, duplicate charges, difficulty cancelling and limited access to human support.Read 15 Oct 2026 · trustpilot.com
Limit: false positives
Trustpilot reviewers report legitimate family, school and business calls being blocked or withheld.Read 15 Oct 2026 · trustpilot.com
Limit: inconsistent blocking
Chrome-Stats reports many reviewers saying calls or texts still get through, are misclassified or are blocked inconsistently.Read 15 Oct 2026 · chrome-stats.com
Ownership news
A January 10, 2024 release says Bending Spoons agreed to acquire IAC’s Mosaic Group assets, including RoboKiller and its intellectual property, for an undisclosed amount.Read 15 Oct 2026 · markets.financialcontent.com
Personal Data Protection
The Personal Data Protection feature scans public-search sites for a user’s information, requests removals and monitors for later exposure.Read 15 Oct 2026 · play.google.com
Praise: effectiveness
Chrome-Stats summarizes repeated praise that RoboKiller significantly reduces spam calls, is useful when it works and is generally intuitive.Read 15 Oct 2026 · chrome-stats.com
Praise: entertainment
App Store reviewers repeatedly praise the humorous Answer Bots and the relief of a quieter phone.Read 15 Oct 2026 · apps.apple.com
Rating on Apple App Store
4.5 out of 5 from 414K ratingsRead 15 Oct 2026 · apps.apple.com
Rating on Chrome-Stats Android review aggregate
3.88 out of 5 from 125,218 ratingsRead 15 Oct 2026 · chrome-stats.com
Rating on Google Play
3.8 out of 5 from 125K reviewsRead 15 Oct 2026 · play.google.com
Rating on Trustpilot
1.5 out of 5 from 330 reviewsRead 15 Oct 2026 · trustpilot.com
Security statement
Google Play reports that the developer declares no data sharing with third parties, encryption in transit and user-requested data deletion, while listing collection of personal information, messages and other data.Read 15 Oct 2026 · play.google.com
Spam blocking effectiveness
Robokiller states its technology is 99% effective at stopping spam calls.Read 1 Oct 2026 · robokiller.com
Spam reporting
Users can report numbers, review scam activity in their state and participate in Spam Patrol.Read 15 Oct 2026 · support.robokiller.com
Spam texts
Robokiller filters SMS and MMS using block/allow lists, number reputation, and content analysis; it states that messages are never stored or shared.Read 1 Oct 2026 · support.robokiller.com
Spam-call blocking
The Android listing says RoboKiller aims to reduce unwanted calls by 99% during the first 30 days and updates its blocklist automatically.Read 15 Oct 2026 · play.google.com
Spam-text blocking
RoboKiller can act as the primary SMS app and automatically filter spam, scam and telemarketing texts.Read 15 Oct 2026 · play.google.com
Supported devices
Robokiller is available for iPhones and Android smartphones and does not work on landlines or other devices.Read 1 Oct 2026 · support.robokiller.com
System requirement Android
Google Play distributes RoboKiller for Android devices and lists it as a 5M-plus-download communication app.Read 15 Oct 2026 · play.google.com
System requirement iOS
The App Store listing requires iOS 15.0 or later on iPhone and iPad.Read 15 Oct 2026 · apps.apple.com

Plans and prices

Free Free Global blacklist · spam-call notifications · weekly insights · spam reporting · Spam Patrol Read 1 Oct 2026 · robokiller.com
Free Free Global blacklist · spam notifications · weekly call/text insights · spam reporting · Spam Patrol Read 15 Oct 2026 · support.robokiller.com
Weekly Protection $4.99 a month $4.99/month Recurring billing · cancel anytime · free trial Read 1 Oct 2026 · app.robokiller.com
Annual plan discount $31.99 a year Billed as $31.99/yr 20% annual-plan discount Read 1 Oct 2026 · app.robokiller.com
Premium annual $31.99 a year Billed as $31.99/yr Custom protection · block/allow lists · caller screening · pause blocking · Answer Bots Read 15 Oct 2026 · app.robokiller.com
Annual Protection $39.99 a year $39.99/year Recurring billing · cancel anytime · free trial Read 1 Oct 2026 · app.robokiller.com

Every RoboKiller plan and price →

Strong points and limits

Strong points

  • Filters both spam calls and spam texts.
  • Free version includes weekly insights and spam reporting.
  • Call Screening asks unknown callers for their name and reason.
  • Text filtering uses block and allow lists.

Limits

  • Answer Bots and Call Screening require a paid plan.
  • Those features require carrier support for Conditional Call Forwarding.
  • Does not work on landlines or other devices.

Who it suits

RoboKiller suits iPhone and Android users who want call and text spam filtering. Users who want Answer Bots or Call Screening need a supporting carrier and plan for Conditional Call Forwarding.

Verdict

RoboKiller offers basic call and text protections in its free version, with additional call-handling features behind a paid plan. Check carrier compatibility before relying on Answer Bots or Call Screening.

Where Specifiction places it

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