Dewey is an AI accountability buddy that helps users manage their to-do lists and develop new habits through personalized text message reminders. It uses conversational AI to interact with users, allowing them to converse with their to-do list and receive nudges throughout the day. Dewey can also answer simple questions, such as providing recipes or looking up historical facts, reducing the need to search externally. The tool is designed to keep users organized, productive, and motivated by sending reminders at customizable intervals (default every three hours between 7am and 9pm). It supports habit formation by checking in on progress and helping break old habits. Dewey is free for up to 3 open tasks, with a planned paid plan for unlimited tasks. The service is accessed via SMS text messages, requiring only a mobile phone number to get started.