The most immediate difference that you might notice is how colorful and playful Marvin's design is. But that's just the tip of the iceberg. Marvin is centered around the concept of planning a day and working off tasks from a daily list. This is hard to implement well with most other productivity tools. Marvin also has a ton of unique features (and more being added all the time!). We call them strategies and each one can be turned on/off, which allows you to build a unique productivity system that works for you.... More Info »
Marvin can also be used solely as a day planning tool. Each day you can make a daily todo list with Marvin - pulling tasks from another application or even paper planners. Marvin offers many features that can help you not only plan a great day but also work off those tasks (super focus mode, timers, time estimates, sectioning your day etc.). So it has a lot of benefits even if you use another application to store your tasks/projects (e.g. Todoist, Wunderlist, Trello, Asana etc.)
Many features in Marvin are specifically designed to improve procrastination. But procrastination is a complex issue and simply storing your tasks in Marvin is not going to transform you into a productivity monster overnight. But if you struggle with procrastination and getting things done, Marvin will be a HUGE help. We recommend reading through out best practices guide to learn how to get the most out of Marvin. Also reach out to us or the community when you feel like you are not making improvements so we can help guide you. We are also working on an anti-procrastination course for our users that will be very helpful in fighting the procrastination habit.