The AI caller check.

The call comes at nine at night.

It is your grandson. There has been an accident, he needs money tonight, and he is begging you not to tell his parents.

It is his voice. The pauses. The way he says your name.

He is not on the phone. Thirty seconds of a video he posted two years ago was enough to build it.

Photo via Unsplash. Not an actual customer.

What it would do

Know the numbers your family actually calls from, and tell you plainly when a call is not from one of them. Not a score, not a probability. A sentence.

That is a smaller promise than "we detect fake voices," and it is deliberate. It is also the part that would actually help, because the thing that saves people is not a verdict on the audio. It is a reason to pause and call back on a number they already trust.

Why it is not built

We would rather tell you the real reasons than say "coming soon" and leave it there.

• A phone is not a computer. iPhones stop any app from seeing what other apps are doing, which is exactly what makes the computer scan possible and a phone version impossible. This is a second product, not a port.
• Listening to a live call is off the table on iOS. No app can inspect call audio while a call is happening. Anyone who tells you their app does that on an iPhone is selling something.
• Voice detection itself is oversold. Detectors do well on clean studio audio and much worse on a real phone call, which is compressed, noisy and cutting in and out. A tool that is wrong on a phone call is worse than nothing, because it teaches you to trust it.
• The honest version, matching numbers against the people you actually know, needs almost none of that. It is the version we intend to build.

What you can use today

Both of these are finished, free, and need no account.

If the caller check is the piece you actually want, say so at [email protected]. What people ask for is what gets built next.