Side by side
Call Blocker vs NumBuster
Both stand on spam call blocking apps. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan Android
Call Blocker provides focused call screening and flexible blocking rules on Android, including dual-SIM configurations. Backup choices are broad, but notification support is unfinished and readable JSON requires care.
Visit Call Blocker Free plan AndroidiPhoneWeb
Choose NumBuster if you want caller identification and number checks across Android, iPhone, and web, with community ratings and a free mobile app. Look elsewhere if you live in the European Union, Bahrain, or the United Arab Emirates, where the service is not intended for residents.
Visit NumBusterThe facts
| Call Blocker | NumBuster | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | No |
| Runs on | Android | Android, iPhone, Web |
| Lowest paid plan | Not published | Free or on request |
| Plans published | None | 4 |
| Maker | Not published | Not published |
| Website | gitlab.com | numbuster.com |
| On spam call blocking apps | #13 of 41 | #9 of 41 |
Call Blocker: what it does well
- Blocks numbers, prefixes, and private callers
- Separate settings for each SIM card
- Complete backup and restore
- Optional AES-256-GCM backup encryption
- Supports Android 9 through 17
What to know first
- Blocked-call notifications are not implemented
- Unencrypted JSON backups are readable
- F-Droid inclusion remains pending
- Forces a dark theme
NumBuster: what it does well
- Caller information appears on the call screen on Android and iPhone.
- Call-log number checks are available on both mobile platforms.
- iPhone users can block phone numbers.
- Community reviews and ratings help people assess potential threats.
- A free mobile app is available.
What to know first
- Service and apps are not intended for residents of the EU, Bahrain, or UAE.
- Feature availability can vary by country, device, provider, platform, and legal circumstances.
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