Momentum planner is a weekly planning tool designed around energy awareness rather than traditional time optimization. Unlike conventional planning tools that focus solely on scheduling efficiency, Momentum helps users understand their actual capacity by planning based on realistic energy levels and reflecting on how tasks truly felt to complete. The planner enables users to plan their week around realistic capacity rather than idealized schedules. It provides the ability to adapt plans as circumstances change throughout the week, ensuring flexibility in an ever-changing environment. The reflection component allows users to document how tasks actually felt, creating a feedback loop between intention and experience. Over time, Momentum reveals patterns behind common productivity challenges including overcommitment, task avoidance, and burnout. The tool is specifically designed for people balancing full modern lives who feel overwhelmed by traditional productivity systems. It has shown particular resonance with neurodivergent users, especially those with ADHD, who seek more flexible and realistic planning approaches. The system incorporates AI lightly, primarily for reflection summaries and pattern spotting, with the goal of supporting rather than replacing self-awareness. This approach ensures that users maintain their personal insight while benefiting from technological assistance in identifying trends they might miss. Momentum addresses the visibility problem that many face when plans are scattered across multiple platforms like calendars, notes apps, and to-do lists. By providing a unified view of commitments and energy requirements, it prevents the common scenario where everything appears manageable in isolation but becomes overwhelming when viewed collectively. The planner draws inspiration from endurance training and product sprint planning principles, recognizing that sustainable productivity requires adequate recovery time.