Task manager app development was a request from our long-time customer from Guatemala. The client knew in practice the quality of Celadon's professional mobile app development and was impressed by the fleet management system we worked on, so they decided to trust our team to build a task management app for the team. The client came to us with an existing, off-the-shelf product in production. Celadon was required to provide mobile and web development services to achieve project stabilization and maintenance. At the start, we obtained a ready list of tasks to be done, wishes for future improvements, design, and existing code.