Just in time for the French Open, sports-tracking firm Zepp is launching a big update to its tennis app. The simply named Tennis 2.0 app works with the company's multisport sensor -- a bright, little widget that attaches to golf clubs, baseball bats and tennis rackets. We've taken a few swings with the sensor in batting cages and on tennis courts in the past, and while we praised its ease of use and the fact that it worked with most any bat/racket, we thought the accompanying tennis app lacked the depth of competing options like Babolat's Play series or Sony's Smart Tennis Sensor. Now, Zepp's significantly beefed-up app looks to address many of those concerns.
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