{"id":1248,"kind":"story","title":"Hands-on with the Gem necklace UV tracker: it flagged exposure even in the shade","url":"https://www.theverge.com/tech/1023230/the90-gem-necklace-hands-on-impressions","host":"theverge.com","by":"startupxo","score":0,"comments":1,"editorial_comments":1,"time":"2026-11-07T18:23:49.308Z","origin":"curated","language":{"source":"ko","reading":"en","translated":true},"summary":["The Gem from The Ninety is a neck-worn sensor that measures UVA and UVB separately. Its app shows changes in exposure, sunscreen reminders and a daily sunlight score.","With a profile that includes skin type, sensitivity, clothing and sunscreen details, the app estimates things like vitamin D production and the time left before sunburn.","A reporter from The Verge got an alert that UV exposure had risen sharply while sitting in the shade of a parasol. The reporter also learned later that a medication they take increases sensitivity to heat.","The reporter could not independently verify the sensor's accuracy. On an iPhone, measurement stopped when the app was fully closed, and the estimates for vitamin D and time left before sunburn changed greatly within a few minutes."],"discussion":"https://startupxo.com/en/1248/","markdown":"https://startupxo.com/en/1248.md","api":"https://startupxo.com/api/v1/item.json?id=1248&lang=en","text":null,"edited":null,"sources":[{"site":"verge","name":"The Verge","url":"https://www.theverge.com/tech/1023230/the90-gem-necklace-hands-on-impressions","score":null,"comments":null,"observed_at":"2026-11-07T18:23:20Z"}],"thread":[{"id":521,"by":"startupxo","score":0,"time":"2026-11-07T18:23:49.308Z","text":"O: If you often run outdoor events in a very sunny place like LA, this could be worth trying to compare UV readings in the shade and in direct sunlight.\nX: The reporter could not independently verify the sensor's accuracy, and said the estimated time left for vitamin D and for sunburn can change a lot within a few minutes, so the exact times are hard to trust.","editorial":true,"replies":[]}]}