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PhoneBlock

phoneblock.net

Free plan WebiOSAndroidAPISelf-hosted
Visit phoneblock.net
Spec score 8.2 #8 of 41 in Call blocker apps

What it is

PhoneBlock is a free call-blocking service that uses a community-maintained database to identify unwanted advertising and spam calls. Users can report numbers through the app, website, or personal blacklist, and reports join the shared blacklist. The Android app blocks known spam calls, keeps call history, and supports reports and personal lists; it requires Android 10 or later. For incoming calls, the Android app sends only the phone number’s SHA-1 hash and does not access contacts.

Landline users can choose a router dongle, a Fritz!Box cloud answering machine, or a blocklist phonebook synchronized through CardDAV. The documented iPhone setup syncs spam numbers into contacts through CardDAV; a native iPhone app is in development, and beta registration is available. Phone systems can download the blocklist in different formats or query it through an API. PhoneBlock is licensed under GPL-3.0 and operated as a private project. The operator accepts email requests for help, including for mistakenly listed numbers. PhoneBlock costs nothing, with donations optional; its terms advise against business use.

Spec sheet

Purpose
PhoneBlock automatically blocks unwanted advertising and spam calls using a community maintained database.Read 7 Oct 2026 · phoneblock.net
Support
The operator says users can contact him by email for help, including if their number was mistakenly added to the blocklist.Read 7 Oct 2026 · phoneblock.net
Android app
The Android app blocks known spam calls, keeps a call history, supports spam reports and personal lists, and requires Android 10 or later.Read 7 Oct 2026 · phoneblock.net
Android privacy
For incoming calls, the Android app sends only the phone number’s SHA-1 hash and does not access contacts.Read 7 Oct 2026 · phoneblock.net
Answering machine data
When using the answering machine, PhoneBlock stores the Fritz!Box IP address for registration and compares incoming caller numbers with the spam database.Read 7 Oct 2026 · phoneblock.net
Commercial use
The terms advise against business use and place responsibility for resulting damage on the user.Read 7 Oct 2026 · phoneblock.net
Community reports
Users can report spam numbers through the app, website, or personal blacklist, and reports are added to the shared blacklist.Read 7 Oct 2026 · phoneblock.net
iPhone support
The documented iPhone setup syncs spam numbers into contacts through CardDAV; the page says a native iPhone app is in development and offers beta registration.Read 7 Oct 2026 · phoneblock.net
Landline options
Landline users can choose a router dongle, a cloud answering machine through Fritz!Box, or a blocklist phonebook synced by CardDAV.Read 7 Oct 2026 · phoneblock.net
Open source
The software is licensed under GPL-3.0.Read 7 Oct 2026 · phoneblock.net
Operator
The imprint identifies PhoneBlock as a private project operated by Bernhard Haumacher.Read 7 Oct 2026 · phoneblock.net
PBX/API
PhoneBlock says phone systems can download the blocklist in various formats or query it through an API; its integration page links a community 3CX project.Read 7 Oct 2026 · phoneblock.net
Website privacy
The privacy policy says unregistered visitors’ IP addresses are logged temporarily for error analysis and deleted after 14 days; it says the site has no ads or third-party trackers.Read 7 Oct 2026 · phoneblock.net

Plans and prices

PhoneBlock Free Free to use · donations optional Read 7 Oct 2026 · phoneblock.net

Every PhoneBlock plan and price →

Strong points and limits

Strong points

  • Users can report numbers to the shared blacklist.
  • Android app keeps call history and personal lists.
  • Landline options include Fritz!Box and CardDAV.
  • Phone systems can download or query the blocklist.
  • Free to use; donations are optional.

Limits

  • Android app requires Android 10 or later.
  • Native iPhone app is in development.
  • Terms advise against business use.

Who it suits

PhoneBlock suits people seeking community-based spam-call blocking on Android, or landline users who can use its listed router, Fritz!Box, or CardDAV options. Its terms advise against business use.

Verdict

PhoneBlock offers several ways to use a shared spam-number database, including Android, landline setups, and a phone-system API. iPhone users have a documented CardDAV setup rather than a native app, and the terms advise against business use.

Where Specifiction places it

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