Timeful plugs into a calendar and then asks you to enter tasks, projects, events and hobbies into the app. An algorithm then creates a schedule tailored to a person's needs and preferences. The more information that is entered into Timeful and the more people use the app, the better it becomes at learning users' activity patterns, schedules and habits.

Google has not yet spelt out plans to integrate Timeful's technology into its products. On its home page, Timeful stated that its product's features will end up in Google Apps, the workplace email and productivity suite that includes Gmail, Docs and Drive.

It's a deal. Google snags Timeful. Image: iStock/Robert Churchill

However, Google made no reference to Apps in its announcement, mentioning instead individual products like Calendar and Inbox, the new email app now in preview that may eventually replace Gmail. Neither company indicated when Timeful's features will appear in Google's products.

Timeful completed a $7m funding round in May 2014 attracting investment from A-Grade Investments, Pitango Venture Capital, Data Collective, Greylock Partners, Kleiner Perkins Caufield & Byers and Khosla Ventures.

For now, iOS users can still download and use Timeful, but its staff will now focus on Google projects. For people concerned that Google will eventually drop support for the app, Timeful offered instructions on how they can export their data.

Google didn't disclose how much it paid for Timeful nor whether all of the about 20 Timeful employees will join the search giant.

Neither Google nor Timeful immediately replied to requests for comment.

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