Microsoft several years ago acquired the popular iOS app Wunderlist with the intention of building out its own list-making productivity app that brings the best of Wunderlist’s feature set to a larger group of mobile consumers. This is a similar path as Microsoft took with email app Accompli, which later became Microsoft Outlook for mobile devices. In the case of Wunderlist, Microsoft didn’t just rebrand the app — it built a new one called Microsoft To Do. With Wunderlist up and running for years alongside To Do, its founder wants to know if he can just have it back.