Side by side

Call Blocker vs Robocall Blocker

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.

Call Blocker

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

Robocall Blocker

Free trial AndroidiPhone

Robocall Blocker combines caller screening with scam-number and SMS checks, but platform behavior differs between Android and iOS. It is a paid service included with select plans, with setup requirements and a 30-day trial.

Visit Robocall Blocker

The facts

	Call Blocker	Robocall Blocker
Free plan	Yes	A free trial
Open source	Not published	Not published
Runs on	Android	Android, iPhone
Lowest paid plan	Not published	Essentials (individual): $9.99 a month
Plans published	None	6
Maker	Not published	Not published
Website	gitlab.com	allstateidentityprotection.com
On spam call blocking apps	#13 of 41	#34 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

Robocall Blocker: what it does well

Screens unknown callers before connecting
Checks numbers against millions of scam numbers
Offers caller allow and block lists
Checks suspicious SMS links and senders
Encrypts data in transit, per Google Play

What to know first

No free plan
iOS filtering excludes iMessages
Android SMS analysis transmits full unknown messages
Activation requires portal setup, permissions, and call forwarding

Alternatives to Call Blocker Alternatives to Robocall Blocker The whole list