Google Inc. (Nasdaq: GOOG) has purchased Timeful, a maker of scheduling software, as a means of expanding mobile services in order to attract more advertisers and users.

The Mountain View, California-based target is backed by AGrade Investments, Data Collective, Greylock Capital, Khosla Ventures, Kleiner Perkins and Pitango Venture Capital. Timeful will be integrated into Google's current offerings, including Inbox, Calendar and Docs.

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