A software development kit (SDK) is available for all applications in which existing mobile apps are to be equipped with locandis technology. On the one hand, the locandis SDK ensures precise indoor and outdoor localization with the aid of sensor fusion. For this purpose, locandis uses a variety of sensors integrated in today’s smartphones, including the earth’s magnetic field and, of course, the locandis locators. Another core functionality is campaign control, which also works completely offline with locandis. The locandis SDK also works when the app is closed.