Privacy Policy

YoMatrix is a private messenger, so privacy is the whole point. It is built end-to-end encrypted and device-first: your messages, calls and notes are encrypted on your iPhone or iPad, and the overwhelming majority of what YoMatrix touches never leaves your device in a form anyone but your contact can read. This page explains exactly what stays on your device, the few things that travel over the network and why, and the choices you have.

What we can never read

Your conversations are end-to-end encrypted with keys that live only on your devices. We do not hold those keys and cannot read your content. None of the following is ever readable by us, sold, or shared with data brokers:

• The contents of your one-to-one and group messages.
• Your voice and video call audio and video.
• Attachments, voice notes, photos and files you send.
• On-device transcriptions of voice notes and voicemail.
• Disappearing messages — once they expire, they are gone.

YoMatrix has no advertising, runs no profile of you to target ads, and never sells your data. Messages are encrypted with Curve25519 key agreement, HKDF-derived keys and AES-256-GCM, with a fresh ephemeral key per message, and you can verify a contact with a 25-digit safety number.

No phone number, no email

Your identity is a globally-unique @username — no phone number and no email address are required to use YoMatrix. You add contacts by scanning a QR code in person or by their chosen username, so your conversations need not be tied to your real-world identity or a contact-list upload.

The only data that travels over the network

A small number of clearly-purposed network calls exist. Each uses certificate-pinned HTTPS, and none of them gives us the content of your conversations:

• Encrypted message & call routing. To deliver an encrypted message or set up a call, our relay forwards the encrypted envelope between devices using minimal account identifiers. The relay is “blind” — it moves ciphertext it cannot read. Calls connect device-to-device whenever the network allows, with an encrypted relay fallback when a direct connection is not possible.
• Push notifications. So your device can wake for a new message or call, a notification is sent through Apple's Push Notification service. The push does not contain your message content.
• AI assistant & translation. If you use the built-in AI assistant, the question you type (and, for translation, the text you ask to translate) is sent to our own privately-owned servers to generate a reply. See “AI assistant” below.
• Email features. If you connect the optional email assistant (for example, to read your Gmail), that mail is handled to provide the feature and is clearly labelled not end-to-end encrypted, because email itself never is.
• Purchases. Your Pro subscription status is provided by Apple's App Store. See “Payments” below.
• Support requests. Only if you contact us — your message and the email address you choose to provide.
• Launch notifications (website only). If you sign up on our website to be told when YoMatrix is publicly released, we store the email address you enter and use it solely for that announcement. It is never shared or used for marketing lists, and you can have it deleted at any time by emailing support@yomatrix.app.
• Optional anonymous diagnostics. Aggregate, anonymous crash and reliability reports that contain no message content. You can turn these off.

AI assistant

YoMatrix's built-in AI runs on our own privately-owned servers. Nothing is sent to any third-party AI service (such as OpenAI or Anthropic). Questions you send to the assistant are processed ephemerally to produce an answer and are not stored, and the assistant is not given your message history. The optional email assistant only sees the mailbox you connect, for as long as you keep it connected.

Payments

The messenger is free. The AI assistant is freemium — a free daily allowance, plus an optional Pro subscription for unlimited use and AI voice calls. All purchases and subscriptions are handled by Apple through the App Store under Apple's terms; YoMatrix never sees or stores your card details. You manage, renew or cancel a subscription in your App Store account settings.

Your choices

• Use a username instead of any real-world identifier.
• Set disappearing-message timers so content removes itself.
• Turn off optional anonymous diagnostics in the app's settings.
• Leave the email assistant disconnected, or disconnect it at any time.
• Delete your account, which removes your account data from our relay.
• Request deletion of any support correspondence at any time.

Children

YoMatrix is not directed to children under the age required to consent to digital services in your country, and we do not knowingly collect data from them.

Contact

Questions about this policy, or a data request? Reach us at support@yomatrix.app or via the support page.