Voice, Video, Images, and Texts Can Be Faked.
Private Codewords Can't.

Yes. Trust Onion is free to download and use. Family codewords, group verification, and Proofies are all included at no cost. No credit card, no trial period, no paywall.

Because we built it to protect our own families. Trust Onion is completely free, with no paid plan, no credit card, and no paywall. Every feature is included: unlimited family members, rotating family codewords, the iMessage extension, verifying any Proofie, and creating up to 3 Proofies a month. We made the tool that keeps our parents safe, and now we share it with you.

100% Yes. Trust Onion was designed to pass the "mom test." Download the app, scan a QR code to join your family group, and you can see the codewords immediately. No account creation required for basic use. No technical knowledge needed. If someone in your family can open an app, they can use Trust Onion with confidence.

When someone calls or texts claiming to be a family member, you ask: "What are the codewords?" Trust Onion generates shared codewords that rotate every 60 seconds, visible only to your family group on the Trust Onion app. A real family member opens the app and reads them back, only you and them have access to those words. A scammer with a cloned voice has nothing to say. The call ends in three seconds. It's the same strategy BBC Future highlighted in August 2026 — read our take on the secret codewords that scammers hate.

Yes. Paste any suspicious text into the app's Text Message Checker and press return. It helps you spot warning signs: a caution level, the specific red flags it found, who the message claims to be from, and how to verify directly with a number you look up yourself. It never declares a message trustworthy, because no tool can confirm a sender or where a link leads. It runs entirely on your phone, works offline, needs no login, and nothing you paste is stored or sent anywhere.

No. Codewords are calculated locally on each device with no server involved, nothing exists outside your phone. They're never transmitted over the internet, so there's nothing to intercept. It works even in airplane mode. They rotate automatically, so even if one were overheard, it expires before anyone could use it.

No. Trust Onion is built with privacy at its core. Codewords are generated on your device and never touch our servers. We don't track your location unless you choose to include it in a Proofie, and we don't ingest that data either, just pass it to your recipient. We don't sell data, serve ads, or share your information with third parties.