Why it's built the way it is
Evidence, transparently
The app never claims a frequency cures a skin condition. Where research is strong we say so; where it is preliminary, we say that too. The Science page cites every source.
Alongside, never instead
Skin Resonance is designed to work with the products, tools and professional care you already use, not to replace any of them.
Yours, not rented
One €12 payment, lifetime access, no subscription and no tracking. Your session notes stay on your own device.
Made in the south of France
Skin Resonance is made in Saint-Quentin-la-Poterie by Sophie Kazandjian EI, trading as Sophie's Bureau. It is a small, independent, self-funded project, made by one person with care, which is why it is a single, one-time €12 purchase rather than a subscription.
Questions, or want to share how a routine worked for you? Get in touch, Sophie reads every message.