Compatibility matching explained: the 99-question model

“Compatibility matching” gets used loosely, so here’s what it actually means at Nonna — and why it beats judging a person from a photo in half a second. No mysticism, just the model.

Three dimensions that predict a relationship

Decades of relationship research point to a few things that actually predict whether two people last — and none of them are visible in a headshot. Nonna scores three:

• Values & relationship vision — what you want your life and a partnership to look like.
• Life foundations — the day-to-day realities of how you actually live.
• Personality & communication — how you relate, handle conflict, and connect.

Why 99 questions?

Enough to be accurate, not so many you quit. Each question adds signal across those three dimensions, and — importantly — you can stop after the first section and your matches already work. The rest just sharpens your scores over time. It’s designed so a two-minute start is genuinely useful, not a bait-and-switch that demands an hour.

How the score is built

Nonna compares your answers against every other member and computes a compatibility score, weighting the dimensions that most predict a real fit. Then — the part swipe apps never give you — it shows you why you match: the specific places you overlap. A number with a reason behind it is worth infinitely more than a number alone. This is the engine behind our AI matchmaker.

See it for yourself

The fastest way to understand compatibility matching is to try it. Our free 2-minute compatibility check lets you test your score with a crush or friend — no signup needed — and it’s the same model that powers your matches on Nonna.

Create your free account and get matched on what actually matters.