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Teen entrepreneur Zach Yadegari raises $10M for AI startup Persona with wearable device

Zach Yadegari, co-founder of Cal AI, has launched a new AI venture called Persona and secured $10 million in funding led by Vine Ventures. The startup plans to release a $179 wearable band that activates a personal AI assistant, emphasizing user privacy by processing data in the cloud with encryption and user control options.

MyFitnessPal acquires Cal AI, the teen-founded calorie-tracking app, deal closed December 2025

Cal AI, an AI nutrition app that estimates calories and macros from meal photos, was co-founded by Zach Yadegari at age 17 and grew to more than 15 million downloads and over $30 million in annual revenue. MyFitnessPal acquired the company in a deal that closed in December 2025. Yadegari is set to discuss the app's growth and his approach to capitalizing on it at TechCrunch Disrupt 2026.