Guides & methodology
How each tool actually works
Every tool on shdjxg.com ships with a full guide explaining its method, its inputs, and where its recommendations stop being useful. No black boxes — if a result cannot be checked against the method, it should not be published.
01
Perfume Finder Quiz
How to Use the Perfume Finder Quiz (And Read Its Results Properly)
A three-input quiz cannot know your skin, but it can eliminate 90% of a catalogue. Here is exactly what each answer changes, how the scoring works, and where a machine recommendation stops being useful.
7 min read · Updated August 2026
02
Fragrance Note Finder
Fragrance Note Finder: Turning One Note You Love Into a Whole Wardrobe
Most people discover fragrance through a single note. This guide explains how the finder weights top, heart and base placement, and why the same note behaves completely differently in each layer.
8 min read · Updated August 2026
03
Perfume Season Calculator
Perfume Season Calculator: Why Climate Beats Calendar
August in Tokyo and August in Stockholm are not the same fragrance problem. This guide explains the temperature and humidity thresholds the calculator uses, and how to apply them to any city.
9 min read · Updated August 2026
04
Perfume Longevity Guide
Perfume Longevity Guide: Concentrations, Hours and What Actually Makes Scent Last
EDP 6-10 hours, EDT 3-5, cologne 2-3. Those numbers are real averages but they are not the main driver of longevity — material volatility, skin type and application are.
10 min read · Updated August 2026