This Week in Startups(@twistartups):Today on TWiST, we're joined by Stacy Salvi, Co-Founder & CEO of The90. She spent 8 years building wearables at Fitbit (through Google's $2.1B acquisition) and is now betting on a new stat: UV exposure. Her answer is The90 Gem, a piece of smart jewelry that tracks your real UV exposure and tells you exactly when to reapply. See you at 11 AM central! Live details in comments. Company: https://t.co/Y8M5Zta7Dg LinkedIn:

This Week in Startups

@twistartups

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This Week in Startups@twistartups

2026.09.21 15:36

Today on TWiST, we're joined by Stacy Salvi, Co-Founder & CEO of The90. She spent 8 years building wearables at Fitbit (through Google's $2.1B acquisition) and is now betting on a new stat: UV exposure. Her answer is The90 Gem, a piece of smart jewelry that tracks your real UV exposure and tells you exactly when to reapply. See you at 11 AM central! Live details in comments. Company: LinkedIn: