Who Called review
A free, open-source blocker with screening, community scoring, and offline analysis.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Who Called is a free, open-source mobile app for filtering telemarketing calls, scams, and spam. It is aimed at people who want call blocking across Android and iOS without creating an account. Automatic filtering, suspicious-call alerts, number reputation lookup, and anonymous reporting cover the main tasks of identifying and handling unwanted calls. An optional SMS shield extends protection to scam messages.
The Free plan costs €0 and includes call filtering, community reports, and Android and iOS apps. Its filtering approach combines official telemarketing-prefix lists with anonymous community reports and scoring, giving users more than a simple manually maintained blocklist. Call screening and suspicious-call alerts add an intervention point before a potentially risky conversation, while local analysis and offline list use allow call checks to happen on the device. The product also states that it does not sell personal data.
Who Called is particularly focused on filtering and reputation signals rather than verified caller identification. That makes it a clear fit for users who value open-source protection, community reporting, and local processing. Its Android and iOS coverage supports a broad mobile audience, although the iOS App Store release is forthcoming. Choose it for free protection against telemarketing and scam calls, with optional SMS filtering; consider another app if verified caller identity is the central requirement.
Who Called pros and cons
- Where it wins
- Free open-source protection for Android and iOS
- Combines official telemarketing lists with community reports
- Adds screening, SMS shielding, and offline call analysis
- Where it doesn't
- Caller ID is not verified
- The iOS App Store release is forthcoming
- No custom blocked-number limit is specified
Who Called fact sheet, pricing and score →
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