Another day, another milestone for Serena Williams. The 39-year-old appeared on the cover of *Fast Company*as one of the monthly business magazine's most productive people.

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The feature focuses on what apps she uses the most and how she manages her busy schedule. The 23-time Grand Slam champion is a huge fan of Toggl, an app that keeps track of how she spends her time (hint: it's family, tennis and her businesses).

Given her husband Alexis Ohanian is the co-founder of Reddit, Serena has a leg up in the tech industry. Her other most-used apps include Zero (to track her eating habits), Zoom, Slack, Pinterest and Dispo (a disposable camera app).

In reading the feature, it's very clear, and not surprising, that Serena is extremely organized with her time as well as punctual and disciplined. The only thing that has changed for her across decades of success is her focus shifting to her daughter Olympia.

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Now that she's in the tennis off-season, Serena has been devoting more of her time to Olympia and her businesses including Serena Ventures, S by Serena and a soon-to-be-launched multimedia company.