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Health Apps: A Robust Business

There are currently some 100,000 health apps on the international market, while the new Apple Watch and fitness tracker wristbands can also help monitor users' activity, exercise, food, weight and sleep. But can gadgets really make us lead healthier lives?

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They can be used by health-conscious people to keep tabs on their exercise and diet regimes, and by people with health disorders to manage their condition. Pharmaceutical companies, health insurers and doctors are increasingly interested in incorporating them into their work. But consumer watchdogs have voiced concern about unforeseen consequences.