Call Blocker - Block Numbers

Contains adsIn-app purchases
4.0
178K reviews
10M+
Downloads
Content rating
Everyone
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About this app

Spam Call Blocker, Call Filter and Caller id in a single app free app - CallMaster.
CallMaster blocks spam calls and the following types of flagged calls from our database: block spam calls, block robocalls, spam likely, scam call blocker, and potential fraud calls. After call screen enables you to instantly block any unwanted callers or unknown numbers.
Key Features:
★ Spam Call Blocker
★ After call menu for instant number blocking
★ Call Filter
★ Block unknown callers
★ Telemarketing, spam and robocall blocker
★ Call Filter from blacklist on your device.
★ Block calls from our extensive spam database.
★ Caller ID
With CallMaster you can block spam calls, phone numbers and contacts
from your phone book or dialer.
CallMaster uses accessibility capabilities to control volume keys on your device. The app does not collect and does not send any kind of information. We also use "draw over other apps" permission to display Spam Warning in real-time
Thank you for using Caller ID, Call Blocker - CallMaster
Updated on
Jul 15, 2025

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
This app may share these data types with third parties
Contacts, App activity and 2 others
This app may collect these data types
Personal info
Data is encrypted in transit
Data can’t be deleted

Ratings and reviews

4.0
177K reviews
TD Garber
July 3, 2022
UPDATE: Call Recorder doesn't work. Only records one side of the call - yours. Unfortunately, call recorders no longer work; none of them. The call blocking is not as good as I need. So many spoofed numbers were slipping by. Had to replace. ORIGINAL: Only had it installed for a few hours and it's asking for a review. So I don't know. Haven't received any calls yet. Might want to adjust the program to wait until the user has actually used the app before requesting a review.
46 people found this review helpful
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Keisha Edmondson
April 20, 2023
Works great except when I'm on Bluetooth at work. There's too much background noise to hear the recording. But I'm not sure if that's really anything that could be fixed. I have recommended this app to a couple of women already!! Thank you! *Update* App no longer records any calls even after checking settings and making sure it was set to automatically record all calls. It's now completely useless to me.
46 people found this review helpful
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Teri Hammond
September 15, 2022
So far, so good. Recordings are clear, memory management is nice, no spam, easy user interface, and at thos point, no problems. Good Update 9/14/22 - I've had several recordings that were really important that didn't seem to work and I can't get ahold of anybody for assistance. There's literally no customer service or contact option on the app that actually works, and there's no indication of how we're supposed to request help. Their FAQs are woefully limited in scope. Frustrating
62 people found this review helpful
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What’s new

Improvements and bug fixes