While iOS and the App Store have no shortage of ways to create and manage to-do lists, RealMac Software along with Impending are offering up Clear, a new to-do app now available for $1 for a limited time. Clear is a visually-oriented, iPhone-centric task and note app that offers basic features but done in an elegant way. Though the app is compatible with iPad, the company says an iPad-centric version is in the works.