Call Blocker is a utility app for iOS and Android that identifies and blocks spam calls using a community-sourced database.
Product velocity
Maintenance
Daily rank 🇺🇸
#162
Utilities · grossing
Sentiment
4.3
827k reviews
Nemesis
Robokiller: Spam Call Blocker
The App DNA
What makes this app unique?
Users report: Users hire this app to reclaim their time from telemarketers and scams, prioritizing immediate, background-level protection over complex features.
For Mobile users seeking protection from telemarketers, robocalls, and phone scams.
What does it look like?
Key features
Public database lookup for phone numbers to identify callers and report spam via community feedback
System-level integration to block incoming calls and identify commercial numbers on iOS and Android
Curated list of legitimate business and support numbers confirmed by internal moderation teams
Removes ad-supported limitations and provides unrestricted access to the full spam database
Pre-emptive blocking of up to 200,000 known dangerous phone numbers based on regional data
How much does it cost?
Subscription model anchored at $7.99/month, gating advanced security features and ad removal behind a recurring payment.
Velocity
Maintenance developmentperformanceUX improvementsShow more...
The app has released 5 updates over the last 10 months, averaging approximately 0.12 releases per week, which falls into the maintenance tier. Development is characterized by infrequent, minor stability updates rather than consistent feature iteration. The latest release on April 30, 2026, continues this trend of opaque bug-fix-only updates. There is no evidence of live-ops activity or a high-frequency release schedule.
Who built it?
UnknownPhone.com
2 apps tracked · Utilities
Call Blocker - Stop spam callsUser Sentiment
What do users think recently?
Fresh user feedback skews excited. Users appreciate effective call blocking functionality provides immediate relief from unwanted spam and robo-call interruptions and background operation ensures consistent protection without requiring active user management during daily phone usage, but report inconsistent blocking performance post-update allows spam calls to bypass filters and reach the user.
How are ratings & reviews evolving?
What users say, by theme
- 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
- Inconsistent blocking performance post-update allows spam calls to bypass filters and reach the user
99 of 99 recent reviews analyzed · high confidence · Excited overall
Read the full review analysisUnlock 2 more frustration themes and 2 user requests, each backed by review evidence.
Access the full report for freeCompetition
Competitive landscape for Call Blocker
How's the Utilities market?
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.
Read the market outlookThe rivals identified
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.
- 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
Unlock the head-to-head verdict: where this rival wins, and where it loses.
Access the full report for freeThe Analyst's Read
Key takeaways for Call Blocker
Where is it heading?
Users report: 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.
The SWOT
- 10M-number database provides deep spam-detection coverage
- System-level integration ensures reliable background blocking
- SMS spam filtering integration addresses top-requested user gap
- Automated database sync would reduce churn
Next best moves
Automate database synchronization because manual refresh is a top-cited usability gap → increase daily active usage
+ 2 more prioritized movesThe counter-intuitive read
The app's reliance on manual database updates is a strategic vulnerability…
Read the full takeFeature gaps
AI-driven automated call-answering bots (available in Robokiller) +1
Since the last report: The app shifted to a subscription-based monetization model and introduced new premium features, while struggling with subscription stability and persistent manual update friction.
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.
Unlock 2 critical frictions, 2 market threats, 2 more prioritized moves and the analyst’s take.
Access the full report for freeReport last updated