Your blueprint stays yours.

Last updated 10 August 2026 · SIIIX is operated by Millijoin AB (Sweden).

SIIIX is an intimacy app for two people who have already met. The whole product is built on one idea: you keep a private blueprint of what you want, and the app only ever surfaces what you and another person have in common. Nothing you hold alone is shown to anyone. This policy explains what we collect, why, and the control you have.

What we collect

Account. When you sign in with Apple we receive an identifier and, if you allow it, your name and a relay email. Your date of birth, which you enter to confirm you are 18 or older.
Profile. Your display name, photos, and the basics you choose to add such as gender, who you are into, city, relationship status.
Your blueprint. Your private answers about what you want, which can include intimate and sexual preferences.
Connections and messages. The people you pair with and the messages you exchange with them, including with SIIIX Support.

How we use it

To run the app: create your profile, let you pair with people you invite, and power your chats and plans.
To surface only the overlap between you and a connection. Your individual answers are never revealed to the other person; only what you both hold is shown, and only once you are connected.
To keep the app safe and working, and to answer you when you contact Support.

We do not sell your data. We do not use it for advertising. There is no feed and no way to browse strangers.

Intimate data and consent

Some of what you record is data about your sex life and sexual preferences. Under GDPR this is a special category of personal data. We process it only with your explicit consent, which you give inside the app and can withdraw at any time. If you withdraw consent we stop that processing and remove that data from what the app surfaces.

How it is protected

Every record is isolated to its owner at the database level, so one person can never read another person's private data.
Photos are held in private storage that only you, and the people you are actively connected with, can open. There are no public links.
The overlap is computed on our servers, so each person's answers stay private and only the shared result is returned.

Who we share it with

We use Supabase as our database, authentication and storage provider, and Apple for Sign in with Apple. They process data on our behalf under their own terms. We do not share your personal data with anyone else, and never with other users except through the mutual overlap you create by pairing.

Age

SIIIX is for adults 18 and over. Your date of birth is checked when you create your account and an under-18 date of birth is refused. If we learn an account belongs to someone under 18 we remove it.

Keeping and deleting your data

We keep your data while your account exists. You can delete your account and your data from inside the app at any time — this removes your profile, your answers, your photos and your messages. We may retain the minimum required by law for a limited period.

Your rights

You can ask to access, correct, export or delete your data, object to or restrict its use, and withdraw consent. Email us at social@stiiicks.co and we will respond. You may also complain to your local data protection authority; in Sweden that is the IMY (Integritetsskyddsmyndigheten).

Changes

If we change this policy we will update this page and the date above.

Contact

Millijoin AB, Sweden — social@stiiicks.co. The fastest way to reach us is the SIIIX Support chat inside the app.