SpamBlocker
SpamBlocker: A configurable, open-source Android blocker for calls, texts, and spam databases. Ranked #21 of 40 in Spam Call Blocking Apps by our editors (6.9/10); pricing: Free plan; best for highly configurable open-source Android filtering.
At a glance
- Editor score6.9 / 10
- PricingFree plan
- Best forHighly configurable open-source Android filtering
- Free planYes
- Paid fromFree
- Facts checked21 Sep 2026
Where it wins
- Open-source Android app with no paid tier required
- Detailed rules include regex, schedules, geolocation, and carriers
- Caller ID, crowd-sourced reporting, and local AI SMS filtering
Where it doesn't
- Android 10 and later only
- Online queries and reporting may send data to third parties
- Advanced configuration may suit technical users better than casual users
Our verdict on SpamBlocker
SpamBlocker is an open-source Android application for blocking unwanted calls and screening SMS notifications. It is designed for people who want detailed control over caller identification, call blocking, and message filtering without replacing the default call or SMS application. The published description covers Android 10 and later, with support for configurable filters, spam-database number blocking, repeated-call detection, emergency exceptions, and optional online number queries.
Its main strength is breadth within Android call and message filtering. Rules can use regular expressions, schedules, calendar events, geolocation, and carrier information, giving users several ways to define what should be blocked and when. The app also supports spam reporting to crowd-sourced databases, while local AI SMS filter training adds a local approach to screening message notifications. This combination makes SpamBlocker a strong fit for users who want to tune filtering behavior rather than rely on a minimal block list.
The trade-off is platform scope and configuration depth. SpamBlocker is built for Android, and its published support starts with Android 10, so it is not suited to users seeking coverage across multiple mobile platforms. Online number queries and reporting can send data to third-party services when configured, while the privacy policy makes GDPR and HIPAA compliance claims. Choose SpamBlocker if open-source availability, detailed rules, and local SMS filtering matter most; choose an alternative if you need broader platform coverage or a simpler, less configurable experience.
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SpamBlocker pricing
SpamBlocker fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| Robocall blocking | Not verified |
| Caller ID | Yes |
| Call screening | Not verified |
| Community reports | Yes |
| Supported platforms | Android |
| Blocked-number limit | Not verified |
| Deployment | Mobile |
| Platforms | Android |
| Compliance & security | GDPR, HIPAA |
| Support | Community, Docs |
| Built for | Solo (editorial estimate) |
| Pricing | Free plan |
| Website | github.com |
| Facts checked | 21 Sep 2026 |
Alternatives to SpamBlocker
- TruecallerA broad caller ID and spam protection app for iOS and Android.9.3
- T-Mobile Scam ShieldA free core service for T-Mobile customers, with paid call-management upgrades.9.1
- Verizon Call FilterA practical Verizon-integrated blocker with useful free protection and paid caller ID.9.0
See all SpamBlocker alternatives →
Also Ranked In
SpamBlocker is ranked in 2 of our directories.
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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