Harmonia is a compatibility engine, and by joining our testing pool you participate in the highest level of technological validation there is: real people, real decisions, real proof. Your data is never monetised. This is research.
Calibration
Visual preferences and personality mappingComplete a six-question personality assessment. Upload your photos. Rate faces on a scale of 1 to 5.
A personalised neural network is shown the faces you rate. It first learns what most people find attractive: the consensus, the population-level baseline of aesthetic perception. Then it freezes that understanding and turns its attention to you specifically, learning how your preferences differ from everyone else's. Every rating teaches it something about your eye.
A personalised map of the looks you are specifically drawn to: the features, the patterns, the qualities your eye returns to. Your Seven Deadly Sins personality profile: seven dimensions, each running from virtue to vice, capturing how you actually behave rather than how you describe yourself.
You rate faces on a scale of 1 to 5; each rating is a teaching signal. A 1 tells the system what you dismiss; a 5 tells it what arrests you; a 3, the ambiguous middle, tells it where your taste is uncertain and the model learns to navigate that uncertainty rather than ignore it. You upload your photos so others can rate you in return. Then you answer six scenario questions in your own words: how you handle a group dinner bill where everyone contributed differently; what you do with a free weekend; how you respond to criticism. Not scales, not tick-boxes; open responses to real situations, because when you are asked 'are you generous?' you answer the way you want to be seen, but when you are asked what you do when the bill arrives, your answer reveals how you actually behave.
Every platform you have used runs one model for all users; the same algorithm decides what is attractive for everyone. This system does the opposite: it learns what most people find attractive first, then learns where you differ. Your ratings build a predictor that belongs to you and no one else. The AI reads your language the same way: not just what you say but how you say it; the patterns in your phrasing; the contradictions between your claims and your tone.
Your personality profile maps you across seven dimensions: where you sit between patience and wrath; generosity and calculation; restraint and impulse; humility and pride. Each score is drawn from how you responded to real situations, not from how you rated yourself. Phase 1 is the foundation; everything that follows builds on what you give us here.
Resonance
Mutual matching and perceived similarityFrom Phase 1, the system filters for people who are attracted to you and you to them. From this filtered batch, you are shown two people at a time. You choose one. Their personality is attached to their card: a Venn diagram showing what you share, how your Seven Deadly Sins profiles overlap. If you choose the same person three times across different pairings, that is a confirmed match.
Perceived similarity. The system finds what you and each person have in common and surfaces it. You see the overlap, never the differences. Personality and visual together shape who appears in front of you and who you choose.
A match where the attraction runs both ways: someone drawn to you, and you to them, with shared personality to make it last. A personalised insights report showing how visual attraction versus personality shaped your decisions, what you prioritised, and what patterns emerged in your choices.
You see two people side by side; you choose one. This is deliberate. Evaluating two people against each other produces more consistent preference data than evaluating one person in isolation; a swipe has no reference point; a comparison forces genuine choice. Each person's card carries a Venn diagram of your shared personality: one might share your impulsiveness and your generosity; the other might share your patience and your ambition. You see only the overlap, never the differences.
Research has consistently demonstrated that no combination of self-reported traits can predict who you will be drawn to before you meet them. What predicts attraction is not how similar you actually are but how similar you feel; two people who share very few traits on paper can experience a powerful sense of connection when the right dimensions are highlighted. The system finds what you share and presents it.
The three-selection mechanic ensures your match is consistent, not impulsive; you must prefer the same person three times against different alternatives before a match is confirmed. Phase 1 built your visual model and personality profile as separate signals; Phase 2 is where they combine. The filtered pool means everyone you see already finds you attractive; the anxiety of rejection has been removed from the equation before you make a single choice.
The insights report will not flatter you. It shows the balance between visual attraction and personality in your decisions: how much each shaped who you chose; what personality type you gravitated toward across pairings; whether your revealed preferences match what you thought you wanted. If you consistently chose based on appearance and ignored personality, it will tell you that directly.
We use AI as a translator, never as a determinant. You are the decider.
Chemistry
Biological compatibility via HLA analysisFor London users: receive a free DNA testing kit. Swab, send it back. For everyone else: if you already have DNA results from a provider like 23andMe or AncestryDNA, you can send them to us.
We process your DNA and determine HLA compatibility: the degree to which your immune system profiles complement each other, a signal linked to scent, attraction, and biological chemistry.
The full three-signal assessment: visual attraction, personality, and biological compatibility combined. An elaborated version of your Phase 1 and Phase 2 results showing how your insights have evolved across all three phases and what the complete picture reveals that the earlier reports could not.
Phase 3 requires critical mass. The genetic signal cannot operate in isolation; it requires a pool dense enough to produce meaningful matches. If you want Phase 3 in your region, the most powerful thing you can do is share this page with the people you know.
You swab, you send it back, and we analyse it. We extract your HLA profile and compare it against every other participant in the pool. Partners with complementary immune profiles tend to find each other's natural scent more attractive; couples with dissimilar HLA consistently report higher partnership satisfaction. This is not a new finding; the research spans decades across multiple populations. What is new is deploying it alongside visual and personality data in a system built for real decisions.
No other platform has combined these three signals. Phase 1 captured what you see; Phase 2 tested what you feel; Phase 3 adds what your biology recognises before your conscious mind does. Unlike visual attraction, which you perceive, and personality, which you sense, biological chemistry operates entirely below awareness; the only way to access it is through the science.
By participating, you contribute to proving whether this works at scale. The report you receive at the end of Phase 3 builds on everything from the first two phases; it shows whether your biological compatibility confirms what visual and personality signals already suggested, or whether it reveals a dimension of attraction that neither could capture.
We use AI as a translator, never as a determinant. You are the decider.