| best for | foundation, concealer, complex skincare routines | lip, brow, blush, eye shadow | fragrance, niche perfumery, hero-SKU skincare |
| core mechanic | undertone and depth quiz feeding a filtered swatch grid | YouCam, Perfect Corp, or Shopify AR overlay | discovery set plus credit-back on full-size |
| conversion uplift (median) | 28% | 18% | 42% on next full-size purchase |
| development effort | 2-3 weeks, structured content rebuild | 2 weeks plus asset prep | 4-6 weeks plus fulfilment ops |
| retention hook | abandoned-shade Klaviyo flow | save the look, share to friend | credit window drives second purchase |
| wrong when | catalog under 12 shades total | skincare or fragrance (the visual does not help) | subscription-heavy models (the credit window collides) |