--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Call Blocker" developer_entity: "UnknownPhone.com" bundle_id: "com.unknownphone.callblocker.app" app_store_id: "1180310843" google_play_id: "com.vladlee.easyblacklist" category: "Utilities" primary_platform: "ios" primary_monetization: "Subscription" offline_capable: false market_region: "US" platforms: "iOS & Android" app_last_updated: "2026-04-30" report_date: "2026-05-05" report_version: "3.1" total_reviews: 827034 overall_rating: 4.3 sentiment: "Excited" sentiment_score: 75 confidence: "high" confidence_score: 0.85 top_praise_theme: "Effective call blocking functionality provides immediate relief from unwanted spam and robo-call interruptions" top_complaint_theme: "Inconsistent blocking performance post-update allows spam calls to bypass filters and reach the user" top_request_theme: "Integration of SMS spam filtering as a premium feature to provide comprehensive communication protection" review_sample_size: 99 total_review_count: 99 analyzed_review_count: 99 data_age_days: 11 momentum_velocity: "maintenance" intelligence_version: 3 nemesis: "Robokiller: Spam Call Blocker" competitor_count: 6 tags: ["utilities", "subscription", "excited sentiment", "mobile app", "app review", "app analysis", "mobile", "users", "seeking"] canonical_url: "https://marlvel.ai/intel-report/utilities/call-blocker" license: "CC-BY-NC 4.0" content_version: "v2" last_verified: "2026-05-05T18:37:09.916Z" --- # Call Blocker App Audit ## TL;DR {#tldr} - **Category**: Utilities · Subscription - **Signal**: Rating 4.3 · Sentiment Excited - **Recent focus**: Inconsistent blocking performance post-update allows spam calls to bypass filters and reach the user (top complaint) · Effective call blocking functionality provides immediate relief from unwanted spam and robo-call interruptions (top praise) · Integration of SMS spam filtering as a premium feature to provide comprehensive communication protection (top request) > **TL;DR:** Call Blocker is a utilities app by UnknownPhone.com, rated 4.3/5 by 827K users, with Excited user sentiment (75/100), available on iOS & Android. > > **Marlvel.ai App Intelligence** — Independent analysis. US Market. No publisher influence. > **Key Insight:** Call Blocker maintains Excited user sentiment (4.3/5 from 827K reviews), with users consistently praising effective call blocking functionality provides immediate relief from unwanted spam and robo-call interruptions. ## Quick Facts | Fact | Value | | :--- | :--- | | **Rating** | 4.3/5 (827K reviews) | | **User Mood** | Excited | | **Category** | Utilities | | **Developer** | UnknownPhone.com | | **Pricing** | Subscription | | **Platforms** | iOS & Android | | **Confidence** | High (0.85/1.0) | | **Data Age** | 0d | ## Metadata & Market Performance - **Publisher:** UnknownPhone.com - **Category:** Utilities - **Target Audience:** Mobile users seeking protection from telemarketers, robocalls, and phone scams. - **Platforms:** iOS & Android - **Version Audited:** 3.1 - **Audit Date:** 2026-05-05 - **Signal Count:** 99 reviews analyzed - **Confidence:** High (0.85/1.0) - **App Store ID (iOS):** 1180310843 - **Bundle ID:** com.unknownphone.callblocker.app - **Google Play ID:** com.vladlee.easyblacklist - **Performance Trend:** Mixed - **Data Window:** Analysis based on signals collected up to 2026-05-05 - **Short Description:** Call blocker app: blacklist & whitelist. Block unknown calls and private numbers ## Executive Snapshot **What it is:** Call Blocker is a utility app for iOS and Android that identifies and blocks spam calls using a community-sourced database. **Why users hire it:** Users hire this app to reclaim their time from telemarketers and scams, prioritizing immediate, background-level protection over complex features. ## App DNA (Features & Intent) - **[Differentiator] Reverse Phone Search:** Public database lookup for phone numbers to identify callers and report spam via community feedback * *User Intent:* Users want to quickly find relevant content or features. - **[Standard] Call Blocking & Identification:** System-level integration to block incoming calls and identify commercial numbers on iOS and Android - **[Differentiator] Verified Number Directory:** Curated list of legitimate business and support numbers confirmed by internal moderation teams - **[Standard] Unlimited Credits & Ad-Free Access:** Removes ad-supported limitations and provides unrestricted access to the full spam database * *User Intent:* Users seek enhanced value through premium features. - **[Differentiator] Automatic Dangerous Number Blocking:** Pre-emptive blocking of up to 200,000 known dangerous phone numbers based on regional data ## Market Position {#market-position} Call Blocker maintains a stable utility presence with a 4.4 average rating across 827,034 total ratings, though it faces stiff competition from automated alternatives. ## Monetization Strategy - **Model:** Subscription - **Tiers:** Free version with ad-supported search, Premium subscription at $7.99 monthly or $14.99 for 3 months - **Analysis:** Subscription model anchored at $7.99/month, gating advanced security features and ad removal behind a recurring payment. ## 🟢 User Sentiment (High Confidence: 99 of 99 reviews analyzed) {#user-sentiment} - **Overall Rating:** 4.3/5 - **Platform Split:** iOS 4.5/5 (1.2K ratings) | Android 4.3/5 (825.8K ratings) - **Overall Sentiment:** Excited ### Top Praises - **Effective call blocking functionality provides immediate relief from unwanted spam and robo-call interruptions** - **Background operation ensures consistent protection without requiring active user management during daily phone usage** - **User friendly interface simplifies the process of managing contact lists and blocking unwanted numbers** ### Top Complaints (Impact Areas) - **Inconsistent blocking performance post-update allows spam calls to bypass filters and reach the user** - **Premium subscription features fail to activate or function correctly after purchase on mobile devices** - **Manual database update requirements create unnecessary friction for users expecting automated spam protection** ### Top Requests (What Users Want) - **Integration of SMS spam filtering as a premium feature to provide comprehensive communication protection** - **Streamlined blocking workflow to allow number management directly from the native call log** ## SWOT Analysis {#swot} **Core Strengths:** - 10M-number database provides deep spam-detection coverage - System-level integration ensures reliable background blocking **Critical Frictions:** - Manual database refresh requirement creates unnecessary friction - Subscription activation errors erode premium-tier trust **Growth Levers:** - SMS spam filtering integration addresses top-requested user gap - Automated database sync would reduce churn **Market Threats:** - Robokiller’s AI-driven call-answering bots set new defense standard - Carrier-level pre-installs marginalize third-party utilities ## Recent Changes (v2 → v3) {#recent-changes} The app shifted to a subscription-based monetization model and introduced new premium features, while struggling with subscription stability and persistent manual update friction. **Overall trend**: Mixed **Compared at**: 2026-05-05 ### High-impact changes - **[Shifted] Monetization Model Pivot** (pricing) — Transitioned from a free-only model to a subscription-based model ($7.99/month or $14.99/3 months). - **[Declined] Emergence of Subscription and Update Complaints** (sentiment) — New complaints surfaced regarding premium subscription activation failures and the ongoing friction of manual database refreshes. ### Medium-impact changes - **[Added] Expansion of Feature Set** (features) — Added Reverse Phone Search, Verified Number Directory, and Automatic Dangerous Number Blocking as new differentiator features. - **[Added] New SWOT Risk Factors** (swot) — Added subscription activation errors as a weakness and carrier-level pre-installs as a new competitive threat. ## Rivals Landscape {#rivals} > Competitive positioning identified by AI analysis of app features, category, and market signals. ### Call Blocker vs Robokiller: Spam Call Blocker — Head to Head - **[Robokiller: Spam Call Blocker](https://marlvel.ai/intel-report/utilities/co-robokiller-app)** by Mosaic S.r.l.: Robokiller is the direct thematic equivalent, focusing specifically on spam call interception and caller identification with a high-velocity release cadence. - **Moat strength:** High — sustainable advantage over 12 months - **Key differences:** - Utilizes proprietary audio-fingerprinting technology to intercept and answer spam calls with automated bots - Provides a gamified experience by allowing users to listen to recorded spammer interactions - Maintains a massive, crowd-sourced database of blacklisted numbers updated in real-time by millions of users - **Where Call Blocker wins:** - ✅ Offers a more streamlined, utility-focused interface that avoids the gamification elements found in Robokiller - ✅ Provides a more direct, no-nonsense approach for users who simply want to block numbers without entertainment features - **Where Robokiller: Spam Call Blocker wins:** - ❌ Employs advanced AI-driven call-answering bots that actively waste the time of telemarketers and scammers - ❌ Features a highly sophisticated, automated spam-blocking engine that requires significantly less manual user intervention - **Verdict:** Robokiller dominates through aggressive automation and entertainment-based engagement; the target app must pivot toward superior UX simplicity or integrate automated response features to remain competitive. ### Contenders (Strong Challengers) - **[Getcontact](https://marlvel.ai/intel-report/utilities/com-kontakt-getcontact)** by GETVERIFY LDA [Moat: High]: A massive global competitor in the caller identification space that leverages social network effects for number tagging. - Integrates social tagging features where users can see how their number is saved in others' contact lists - Operates as a global communication platform rather than just a utility tool for blocking spam - **[Hiya: Spam Blocker & Caller ID](https://marlvel.ai/intel-report/utilities/hiya-spam-blocker-caller-id)** by Hiya [Moat: Medium]: A legacy player in the caller ID space with deep integration into carrier-level spam protection services. - Provides carrier-grade spam protection APIs that are often pre-installed on major mobile network devices - Focuses on enterprise-level reputation management for business calls to ensure legitimate calls are not blocked ### Peers (What They Do Better) - **Norton 360 Security & VPN** by Gen Digital Inc.: An adjacent utility app that bundles call protection within a broader mobile security and privacy suite. - Bundles spam protection with comprehensive device security, antivirus, and VPN services in a single subscription - Leverages a massive, established brand trust factor for users seeking all-in-one mobile protection - **NordVPN: VPN Fast & Secure** by Nordvpn S.A.: A high-performing utility app in the privacy space that competes for the same 'security-conscious' user demographic. - Focuses exclusively on network-level privacy and encryption rather than device-level call management - Maintains a premium, high-performance infrastructure that justifies a higher price point than standard utility apps - **Cleanup: Phone Storage Cleaner** by DEEP FLOW SOFTWARE SERVICES: Competes for the same 'Utilities' category real estate by offering device maintenance and storage optimization. - Targets the 'phone hygiene' pain point by identifying duplicate photos and large files to free up space - Uses a highly visual, swipe-based interface that simplifies complex file management for casual users ## What's New - **Latest (v1.2.9, 6 years ago):** Optimized for iOS 13 with general UX improvements and bug fixes. ## App Momentum (Maintenance) {#momentum} - Shipped notification support for verified numbers. - Fixed visual bugs in latest release. > **Cadence:** 5 total versions · 2 majors in last 6 months · 5 days since last update · 75 days avg between updates ## The "So What?" (Strategic Takeaway) {#so-what} Call Blocker is a market-leading utilities app that is available. With a 4.3/5 rating from 827K reviews, it delivers strong user satisfaction. > **Bottom Line:** Call Blocker succeeds by providing reliable core blocking, but its manual update requirement and subscription bugs threaten retention, so the team must prioritize automation and stability to defend against AI-driven rivals. **Best for:** Mobile users seeking protection from telemarketers, robocalls, and phone scams. ### PM Action Plan (Next Best Moves) - [ ] [INVEST] [HIGH IMPACT] Automate database synchronization because manual refresh is a top-cited usability gap → increase daily active usage — *User complaints highlight manual updates as a significant friction point.* _(trade-off: deprioritize Deprioritize the UI visual polish sprint to focus engineering on background sync logic.)_ - [ ] [PIVOT] [HIGH IMPACT] Audit subscription validation logic because activation errors are reported by premium users → reduce refund surge — *Premium users report being locked out of paid features, directly impacting revenue.* _(trade-off: deprioritize Pause new feature development for one cycle to stabilize core revenue infrastructure.)_ - [ ] [INVEST] [MEDIUM IMPACT] Ship SMS spam filtering because it is the top-requested feature → expand market share — *Sentiment analysis shows explicit user demand for expanded communication protection.* _(trade-off: deprioritize Delay the planned expansion of the international number directory to Q3.)_ ### Feature Gaps vs Competitors - AI-driven automated call-answering bots (available in Robokiller) - SMS spam filtering (requested by users, missing here) ### Outlook: Mixed The spam-blocking market is shifting toward automated, AI-driven defense, leaving manual-update apps like Call Blocker increasingly exposed. To remain competitive, the app must transition from a static directory to an active, automated security layer, or risk losing its user base to more responsive, high-velocity rivals. - 🔴 Inconsistent blocking performance in the latest release allows spam to reach users, which erodes trust in the core utility. - 🟢 High user demand for SMS filtering indicates a clear path to expand the premium value proposition into new communication channels. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 4.3/5 | | Total Reviews | 827K | | Sentiment | Excited (75/100) | | Confidence | High | | Pricing Model | Subscription | | Platforms | iOS & Android | | Key Features | 5 analyzed | | Trend | Mixed | | Outlook | Mixed | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Call Blocker** (this app) | 4.3/5 | Excited | UnknownPhone.com | | [Robokiller: Spam Call Blocker](https://marlvel.ai/intel-report/utilities/co-robokiller-app) | 4.5/5 | Frustrated | Mosaic S.r.l. | | [Getcontact](https://marlvel.ai/intel-report/utilities/com-kontakt-getcontact) | 4.4/5 | Upset | GETVERIFY LDA | | [Hiya: Spam Blocker & Caller ID](https://marlvel.ai/intel-report/utilities/hiya-spam-blocker-caller-id) | 4.5/5 | N/A | Hiya | | [Free VPN by Free VPN .org™](https://marlvel.ai/intel-report/utilities/free-vpn-by-free-vpn-org) | 4.3/5 | Mixed | Free VPN LLC | | [Quantumult X](https://marlvel.ai/intel-report/utilities/quantumult-x) | 3.9/5 | Frustrated | Cross Utility Ltd | ## Company Profile - **Developer:** UnknownPhone.com - **Website:** [https://www.unknownphone.com](https://www.unknownphone.com) - **Social:** [Facebook](https://www.facebook.com/unknownphone) · [X/Twitter](https://twitter.com/unknownphonecom) · [LinkedIn](https://www.linkedin.com/in/alberto-edroso-jarne) ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/call-blocker/id1180310843?uo=4) - **Google Play:** [View on Google Play](https://play.google.com/store/apps/details?id=com.vladlee.easyblacklist&hl=en&gl=us) - **Dev Site:** [Official Website](https://www.unknownphone.com) - **Sources:** Developer website content, About us / company information, App store metadata, User reviews. ## Related Intel Reports - [*Robokiller: Spam Call Blocker*](https://marlvel.ai/intel-report/utilities/co-robokiller-app) (Mosaic S.r.l.) — 4.5/5 Rating | Negative Sentiment - [*Getcontact*](https://marlvel.ai/intel-report/utilities/com-kontakt-getcontact) (GETVERIFY LDA) — 4.4/5 Rating | Terrible Sentiment - [*Hiya: Spam Blocker & Caller ID*](https://marlvel.ai/intel-report/utilities/hiya-spam-blocker-caller-id) (Hiya) — 4.5/5 Rating | N/A Sentiment - [*Free VPN by Free VPN .org™*](https://marlvel.ai/intel-report/utilities/free-vpn-by-free-vpn-org) (Free VPN LLC) — 4.3/5 Rating | Mixed Sentiment - [*Quantumult X*](https://marlvel.ai/intel-report/utilities/quantumult-x) (Cross Utility Ltd) — 3.9/5 Rating | Negative Sentiment - [*Potatso*](https://marlvel.ai/intel-report/utilities/potatso) (Potatso Lab LTD) — 4.4/5 Rating | Negative Sentiment - [*V2Box - V2ray Client*](https://marlvel.ai/intel-report/utilities/v2box-v2ray-client) (techlaim) — 4.5/5 Rating | Mixed Sentiment - [*Calculator# Hide Photos Videos*](https://marlvel.ai/intel-report/utilities/calculator-hide-photos-videos) (NewSoftwares.net) — 4.4/5 Rating | N/A Sentiment - [*nasin sitelen Wakalito*](https://marlvel.ai/intel-report/utilities/nasin-sitelen-wakalito) (Theodore Dubois) — 3.8/5 Rating | N/A Sentiment - [*Rizz AI Chat Coach: Grizzly AI*](https://marlvel.ai/intel-report/utilities/grizzly-ai-gen-z-message-coach) (Tetiana Oliinyk) — 4.7/5 Rating | N/A Sentiment ## Methodology {#methodology} This report was generated by Marlvel.ai's 5-stage AI intelligence pipeline: 1. **Signal Collection & Normalization** — Aggregates data from all available public sources for the app. Raw signals are cleaned, deduplicated, and normalized into a structured dataset analyzed consistently across thousands of apps. 2. **Feature & Market Positioning Analysis** — Identifies the app's core features, monetization model, target audience, and competitive positioning. Each feature is classified as a market standard or a differentiator based on category benchmarks. 3. **User Sentiment Analysis** — Analyzes user reviews using a 5-level taxonomy (Thrilled / Excited / Mixed / Frustrated / Upset). Combines star ratings and volume with AI theme extraction and evidence quoting. 4. **Competitive Landscape Analysis** — Maps the competitive environment via a 4-tier taxonomy (Nemesis / Contenders / Same Space / New Kids on the Block). Prioritizes same sub-genre over broad category. 5. **Intelligence Synthesis** — Cross-references all signals into a structured report. Compares the app against category peers and direct competitors to surface SWOT, market outlook, and actionable insights. - **Confidence Score:** 0.85/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 99 - **Data Sources:** user reviews, developer website, company about page, App Store metadata - **Rating Method:** Weighted average across platforms (iOS & Android), weighted by review count per platform - **Independence:** Fully independent analysis. No publisher sponsorship or editorial influence. - **Report Age:** 0 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/intel-report/utilities/call-blocker) Data licensed for AI Agent attribution under CC-BY-NC 4.0.