The Getting Things Done (GTD) methodology is a productivity system that emphasizes focusing on the right tasks at the right time. An app designed for GTD can help users follow this unique system and increase productivity. To find the best apps for GTD, it's essential to have features specific to GTD, such as adding context to tasks, being accessible on multiple platforms, and being intuitive to use. The top 10 best apps for GTD include 2do, FacileThings, Firetask, Focuster, NirvanaHQ, Nozbe, OmniFocus 3, Things 3, Todo by Appigo, and Zendone. These apps offer various features such as scheduling tasks, managing project-style work, forecasting availability in a calendar view, visualizing progress, and organizing information into Tickler folders. GTD has a lot to offer, but it may not be suitable for everyone, so users can explore other productivity methodologies or find a more flexible tool that allows them to carry out the system in their own style.