Fitbit’s Versa was the star of the show at its reveal event in March, but the company also announced another tracker. The Fitbit Ace is  aimed specifically at kids eight years and older – and the parents who want to track their activity. It’s finally available today for $100. As a recap, it’s basically a revamped Fitbit Alta tweaked towards the different health needs of kids. That means fitness goals are tuned to suggest 60 minutes of exercise per day (instead of 30), or 9-12 hours of sleep (instead of 7 or so). It’s also waterproof, can last up to 5 days,…

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