Instapaper's app, which allows you to save articles to read later, has always been free to use but its most useful features — like text-to-speech playlists and the ability to search within saved text — has been reserved for paid users. Subscriptions previously cost $2.99 a month or $29.99 for a year.When Instapaper was an independent operation, it relied on subscriptions as well as advertising, to keep its business afloat. But now that Pinterest owns the app, it can apparently afford to turn the app into an experience that is completely free for everyone. (This could be bad news for competing app Pocket, which charges $4.99month or $44.99/year for its premium tier.) Add, in case any Instapaper fans were worried about the service's future as an independent app in the wake of Pinterest's acquisition, it appears they have nothing to be concerned about — at least for now. A Pinterest spokesperson tells Mashable the company plans to continue to run the app as a separate product and that it will continue to receive updates and new features.