Energy Level Tracker
Log your energy level each hour to discover your peak productivity times. Track over multiple days to identify your natural energy pattern. All data stays private in your browser.
Log Today's Energy (1-5 per hour)
Your Energy Pattern
Why Track Your Energy Levels?
Everyone has natural energy fluctuations throughout the day, yet most people schedule their hardest work randomly. By tracking your energy levels, you can identify your peak hours — when you are sharpest and most focused — and align your most important tasks with those windows. This simple practice can dramatically increase productivity without adding more hours to your day.
Understanding Chronotypes
Your chronotype is your natural tendency toward being a morning person or an evening person. Dr. Michael Breus identifies four chronotypes: Lions (early risers who peak in the morning), Bears (who follow the solar cycle), Wolves (who come alive in the evening), and Dolphins (light sleepers with irregular patterns). Knowing your chronotype helps you design a schedule that works with your biology instead of against it.
Ultradian Rhythms
Beyond the circadian rhythm (your 24-hour cycle), your body follows 90-120 minute ultradian rhythms throughout the day. These cycles alternate between high and low alertness. The most productive approach is to work in 90-minute focused blocks during high-energy periods and take breaks during natural energy dips. This tracker helps you identify these patterns.
Matching Work to Energy
Schedule your most demanding cognitive tasks — deep work, creative projects, complex problem-solving — during your peak energy hours. Save routine tasks — email, admin, scheduling — for low-energy periods. Physical exercise is best during moderate energy periods. Critical decisions should never be made during energy troughs.
How to Use This Tracker
Log your energy level (1-5) for each hour you are awake. Do this for at least 3 days — ideally a full week — to see reliable patterns. The chart will show your average energy curve, highlighting your peak and trough hours. Use these insights to restructure your daily schedule around your biology.
Tips for Effective Tracking
Consistency is more important than perfection — update your tracker regularly even if the data is not perfect. Set a daily reminder to log your entries while they are fresh. Review your progress weekly to spot patterns and make adjustments. Your data is saved automatically in your browser, so you do not need to worry about losing it between sessions. Export or screenshot your data periodically as a backup.
Frequently Asked Questions
How many days should I track?
At least 3 days to see a pattern, but a full week gives more reliable results. Weekday and weekend patterns may differ, so tracking both is valuable.
What do the energy levels mean?
1 = Very low (exhausted, can barely focus), 2 = Low (sluggish), 3 = Moderate (functional but not sharp), 4 = High (focused and productive), 5 = Peak (highest alertness and performance).
Is my data private?
Yes. All data is stored in your browser's localStorage and never leaves your device. No data is sent to any server.
What are chronotypes?
Chronotypes describe your natural sleep-wake tendency. Lions are early risers, Bears follow the sun, Wolves are night owls, and Dolphins are light sleepers. Your chronotype affects when you peak during the day.
How can I boost my energy during low periods?
Short walks, bright light exposure, cold water on your face, a healthy snack, or a brief meditation can help. Avoid caffeine after 2 PM as it disrupts sleep quality and shifts your energy pattern.
Should I schedule deep work during peak energy?
Absolutely. Your peak energy hours are your most valuable — protect them for your most cognitively demanding and important tasks.
Is Energy Level Tracker free to use?
Yes, Energy Level Tracker is completely free with no sign-up, no login, and no hidden fees. The tool runs entirely in your browser — your data never leaves your device.
Is my data safe when using this tool?
Yes. This tool runs 100% in your browser using JavaScript. No data is sent to any server, stored in any database, or shared with any third party. When you close the page, processing stops immediately.
Does this tool work on mobile devices?
Yes. Energy Level Tracker is fully responsive and works on smartphones, tablets, and desktop computers. The interface adapts to your screen size automatically.
Can I use this tool offline?
Yes. Once the page has loaded, Energy Level Tracker works without an internet connection. All processing happens locally in your browser.
Do I need to create an account to use Energy Level Tracker?
No. Energy Level Tracker requires no account, no registration, and no email. Just open the page and start using it immediately. Your inputs are auto-saved in your browser for convenience.