The amount of the deal was not disclosed. Astrid will join the mobile team of Yahoo! and will no longer be accepting new premium subscriptions.
Founded in 2011 by CEO Jon Paris and Tim Su, the company provides a social to-do list app that allows people to organize their goals, and share ideas.
It was incubated inside of AngelPad and funded from Google Ventures, Nexus Venture Partners and Google Ventures and TMT Investments.