The 4 Best Spam Call Blocker Apps in 2026

Combine three fronts: a caller ID app with automatic blocking (Truecaller or Phone by Google), signing up to the Lista Robinson (Spain's official free opt-out register for advertising, at listarobinson.es) and, since 2023, remembering that the law already bans unsolicited marketing calls in Spain, so you can report the ones that persist to the AEPD, the Spanish data protection authority. The app stops 90% of the noise; the register and the law do the rest.

This is the small print of the sector: Truecaller and Whoscall build their databases partly from information contributed by users, and they ask for a lot of permissions. If privacy worries you, Phone by Google is the clean option: its spam protection runs on Google's own database, without selling data to third parties or showing ads. In exchange, it identifies slightly less local spam than Truecaller.

Yes, both Truecaller and Phone by Google let you silence any number that isn't in your contacts outright: the phone doesn't even ring and the call is still logged just in case. It's drastic but effective if you get a lot of spam. The middle ground is Google's Call Screen, which answers for you, asks who is calling and shows you the transcript so you can decide whether to pick up.