Tether launches AI-powered health app QVAC Health According to CoinDesk, stablecoin issuer Tether is expanding its business beyond the crypto space with a privacy-focused health and wellness app. On Wednesday, the company introduced the QVAC Health app, built on its AI development platform, aiming to let users manage their fitness, nutrition, and biometric data across devices. Tether stated that the app allows users to monitor health data such as step counters, sleep trackers, and fitness tracking data, storing this information offline and encrypted on personal devices. This eliminates the need for commercial server transmission and ensures the data won’t be collected for advertising purposes.