End-to-end encrypted
Every message and every call uses strong end-to-end encryption. The server only ever sees ciphertext — it can never read your conversation or your audio.
Anonymous · End-to-end encrypted
Private by default.
No exceptions.
whât is a messenger and voice-call app with no phone number, no email, and no SIM. Every message and every call is encrypted so that only you and the person you're talking to can read or hear it — not us, not anyone.
- No phone number
- Your keys stay on your device
- Pay once · yours forever
Why whât
Everything private. Nothing tracked.
Truly anonymous
Sign in with a single tap. You get an automatic anonymous handle — no phone number, no email, no SIM card, nothing to link back to you.
Voice calls, private
High-quality encrypted voice calls on a peer-to-peer path. The infrastructure relays signaling only — there is no path where a server can read your audio.
Ephemeral by design
Messages live for 7 days, media for 12 hours, then vanish everywhere. On-device copies are purged to match — no ghost data left behind.
No SIM, no lock-in
Works on any Android device over any connection. Your identity is yours — move to a new phone and re-activate; your history comes with you.
Pay once, forever
No subscriptions. One lifetime license unlocks the full app on your device — a fair, simple model that keeps the service independent and ad-free.
Security
Your keys never leave your device.
whât encrypts with the modern X25519 key agreement and AES-256-GCM authenticated encryption. Each device holds its own private key — nothing sensitive is ever uploaded, and if your keys ever change, the app tells you honestly instead of silently re-encrypting your history.
- End-to-end encryption on every message and call
- Encrypted, versioned keys with honest key-change notices
- Encrypted on-device backups you control
- Ephemeral messages and media that expire everywhere
Getting started
Live in four steps.
- 1
Download the app
Grab the whât APK on your Android phone.
- 2
Try it free
Full access for a 5-minute trial — no account, no sign-up ceremony.
- 3
Buy once
Get your lifetime license in one payment.
- 4
Activate
Enter your code in the app. That's it — private forever.
Pricing
One lifetime license. No subscriptions.
whât lifetime license
One-time
- Full app: encrypted messaging + voice calls
- One license = one active device
- Move to a new phone and re-activate anytime
- No ads, no tracking, no subscription
Checkout opens as soon as payments go live.
Download
whât for Android
The app ships as a direct APK — no store account needed. The first public build is being prepared for release.
On release, the download link will appear here.
FAQ
Questions, answered.
Is it really anonymous?
You sign in with a single tap and receive an automatic anonymous handle. No phone number, email, or SIM is required or stored. The service has no way to tie your conversations to a real-world identity.
What exactly is end-to-end encrypted?
Your device encrypts messages and call audio before they leave your phone. Only the recipient's device holds the key to decrypt them. Not even the servers relaying the data can read it — they only ever handle ciphertext.
How does the 5-minute trial work?
Every new device gets full access for 5 minutes — enough to try messaging and a call. After that, unlock the app permanently with a lifetime license.
How do I activate my license?
After purchasing, you receive a code like WHAT-XXXX-XXXX-XXXX. Open the app, tap the code field on the activation screen, and paste it in. Done.
One license = one device?
Yes. Each license is bound to one active device. If you switch phones, simply enter your code on the new device — your identity and chats move with you and the old device is deactivated.
What happens to my messages?
Messages are encrypted and ephemeral by design: messages expire after 7 days and media after 12 hours. You can delete anything instantly, for you or for everyone, whenever you choose.