RDFit app integrates HealthKit to read and write some data in the Health app. Runde Communication is a high-tech company integrating R&D and production of mobile phones and peripheral products, smart wearable devices, and operating e-commerce; R&D and sales of electronic products, digital products, and smart products; electronic software development, electronic products, communication products, and mobile phones , Communication switching equipment, digital integrated system equipment, special electronic equipment, software product design, technology development and technical consulting and sales; computer software, computer network software development; domestic trade, operating import and export business. users to seek a doctor’s advice in addition to using this app and before making any medical decisions.