Checker is a helpful app designed to assist users in establishing new habits and maintaining consistency towards their goals. It offers a simple method to track activities and showcases progress through a visual calendar grid. This grid provides users with an overview of their progress, highlighting patterns and areas for improvement based on their actions.

The app allows users to track their activities by visualizing data in the calendar grid, where each cell changes color based on the user's actions. Additionally, users can view historical details to analyze their progress over time, enabling them to make informed decisions and adjustments to achieve their desired outcomes.