https://www.reuters.com/article/us-amazon-com-fitness-halo/amazon-launches-first-fitness-band-in-bid-to-take-on-apple-fitbit-idUSKBN25N1Y2 >Amazon.com Inc on Thursday launched its first fitness band and app, Halo, as the e-commerce giant looks to take on Apple, Fitbit and Samsung in an increasingly crowded fitness tracker market.