Naisho私话
Two people, both wearing AirPods with noise cancelling on, cannot hear each other. Open Naisho and the two phones connect directly — each voice goes straight into the other person's ears. Nothing to take out, nothing to turn off.
No server, no account. Your voice goes from one phone to the other and nowhere else.
Not on the App Store yet. TestFlight is Apple's app for handing out builds before release — install it and new versions arrive on their own.
Why
Every one of them starts with the same move: taking a headphone out. Naisho does one thing — it removes that move.
How you use it
Open it and there they are — who is nearby now, and who you talked to last.
One tap from you, one from them. It takes both.
Then just talk. Earbuds stay in, and you can both speak at once.
What it does
Your voice does not pass through a server — we don't have one. Whichever link is working: no cellular, no router, no data used at all. It works in a tunnel.
The links are Wi‑Fi Aware, peer-to-peer Wi‑Fi and Bluetooth.
Nothing to sign up for, no email, no phone number. What you say is never recorded, never transcribed, never stored — when you stop, it is gone.
The only thing that ever leaves your phone is a diagnostic report, and only if you send one or leave automatic crash reports on.
Full duplex — there is no button to hold down. Music drops to the background while someone is speaking and comes back up after; podcasts pause and resume.
The microphone is live only during a conversation, and is released the moment it ends.
Open it and you see which friends are around right now. Ultra Wideband and Bluetooth make "nearby" a great deal more accurate than guessing from signal strength.
If their Naisho is closed, you can wake it.
Who your friends are and when you last talked lives on that phone only and is never uploaded. On a new phone, you become friends again.
Your nickname and avatar emoji are broadcast to people nearby with Naisho open — that is what "seeing who is nearby" is.
The first time, one of you taps the other and the other taps Confirm and join. Nothing connects until both have — nobody gets to connect to you on their own.
That is where a friendship starts, and you can remove every one of them at any time in Settings.
To be precise
Voice
Every voice link between the two phones is encrypted. Apple's Multipeer link is encrypted by requirement, and each of the three links we build ourselves carries its own session key.
Wake
This one is not encrypted. Waking a friend is a signed Bluetooth broadcast: the signature proves it really came from a friend of yours, but the contents are in the clear, and they carry the sender's nickname and avatar emoji. Anything listening nearby can read them.
We write them as two things because they are two things. The full account is in the privacy policy.
Naisho does nothing on one phone.
It has to be on both, and it only works at close range. That is not a limitation waiting to be fixed — it is what is left when you take out the server, the account and the recording.
Naisho is 内緒 in Japanese: a thing said quietly, to one person. What it gives you is a small space with two people in it.
Bring someone with you.
Say something
Something's missing, something's wrong, or you simply have a thought — write to me. One person makes this, and I read the mail myself.
hello@naisho.space