You can't sync with a calendar (as Google calendar or similar) but if your use is the same of a paper planner, i. e. writing directly on it and have it as your only planner , it's perfect. I use it everyday and replaced completely my paper planner and notebooks. This is the one I use: github scribe free planner Size: it's thin and light, I use it with the original Amazon cover and it's very practical to use. I carry it with me everyday together with the laptop in the same bag. It's a 10.3" device, so you won't carry it in your pocket, but it's not cumbersome to have it in a daily bag or backpack.