On a swipe-based app, the first decision anyone makes about you comes from a photograph. Whatever you would actually want a stranger to know — what you care about, what you find funny, how you spend a free Saturday — plays no part in it, because none of it is visible in the picture.
The usual remedy is a compatibility questionnaire: answer a fixed list of items, receive a score, get shown people with similar scores. That hands the definition of who you are to whoever wrote the questionnaire, and it produces a number nobody outside the app can check.
Qulo takes a third route, and it is worth stating plainly: Qulo does not measure personality and calculates no compatibility score. What it does is let you write the questions yourself — between two and four of them, up to ten on a paid plan, four options each, with the true answer marked — and a match happens only when someone gets every single one right.