Reuters — Fitness trackers remained big business at this year’s IFA consumer technology fair in Berlin, with major players like Fitbit and Garmin announcing new devices. However, waterproof fitness trackers for swimmers are often limited to data gathering, such as stroke rate per minute or distance swam. Hong Kong-based start-up Platysens is hoping to make a bigger splash with its ring-style swim analyser. Instead of a typical wrist-worn device, their ‘Seal’ prototype comprises two ‘rings’ […]