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Fitness & Wellbeing

Mood & Sleep
Tracker

Log how you feel each day — mood, energy, sleep, and a note. See your patterns over time. Takes 30 seconds. Builds self-awareness over weeks.

🔒 Private — all data stays in your browser, never sent anywhere
How are you today?
—
Mood
Energy 5
Sleep hours 7
✓ Entry saved!
Your history
Mood (last 30 days)
Sleep hours (last 30 days)

Why track mood & sleep?

Most people are unaware of the patterns shaping how they feel. Tracking reveals connections — between sleep quality and next-day mood, between energy dips and specific days, between habits and wellbeing. Even 2–3 weeks of data produces meaningful insights that are invisible in the moment.

Privacy — your data stays local

All entries are stored in your browser's localStorage — they never leave your device and are never sent to any server. Clearing your browser data will clear your entries. If you want a backup, use your browser's dev tools to export localStorage data.

How to build the habit

The best time to log is at a consistent moment each day — right after waking, at lunch, or just before bed. Keep the bar low: even just selecting a mood emoji counts. The streak effect is powerful — seeing consecutive logged days motivates continuation far more than any other technique.

What patterns to look for

After 2 weeks, look for: Does low sleep consistently precede low mood? Are there specific days of the week where energy dips? Do mood scores trend upward or downward over time? These micro-insights are exactly what therapists and coaches ask clients to collect manually — this tool automates the pattern-spotting.

Frequently Asked Questions
How does sleep affect mood? ▾
Sleep deprivation directly impairs the prefrontal cortex — the brain region responsible for emotional regulation — while amplifying the amygdala's reactivity to negative stimuli by up to 60%. Even one night of poor sleep increases irritability, anxiety, and difficulty concentrating. Tracking both mood and sleep together helps you identify your personal threshold: how many hours you need before your mood reliably declines.
How many sleep cycles should I get per night? ▾
A full sleep cycle takes 90 minutes and consists of light sleep, deep sleep, and REM sleep. Most adults need 5 complete cycles (7.5 hours) to feel fully rested. Getting 4 cycles (6 hours) leaves most people sleep-deprived over time even if they feel 'used to it'. Track your sleep hours here alongside mood to discover the exact amount that works best for your body — it varies between 7 and 9 hours for most adults.
What is the best time to log mood? ▾
End-of-day logging gives you a retrospective view of the whole day but is subject to recency bias — a bad last hour colours your entire-day rating. Mid-day and end-of-day dual logging is more accurate. If you can only log once, late afternoon (around 4–5pm) tends to be the most representative time, avoiding both morning grogginess and evening fatigue. Consistency in timing matters more than perfect timing.
What mood patterns are most common to discover? ▾
The most common discoveries: mood dips on low-sleep days (2–3 day lag is common), mood improves after exercise logged on previous day, Sunday or Monday mood drops related to work-week anticipation, and seasonal patterns emerging over months. Users who track for 30+ days almost always find at least one non-obvious pattern — the data reveals what intuition misses.
Should I track mood numerically or with labels? ▾
Both approaches work but serve different purposes. Numerical scales (1–10) are better for spotting trends in charts over time. Emoji or label scales are faster to log and reduce friction, which improves consistency. This tracker uses a numerical scale because it enables meaningful pattern analysis. Whatever system you use, the most important factor is logging every day — an imperfect daily log beats a perfect occasional one.
Related Tools
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Accumulated deficit · Recovery plan
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Stress Tracker
Log stressors · Coping log · Patterns
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How to Use the Mood & Sleep Tracker

Log daily wellbeing data and spot correlations between sleep quality and daytime mood.

01
Log today's data
Rate your mood (1–10), sleep quality, sleep duration, energy, and any notes about the day. Aim to log at the same time each day.
02
Include sleep duration in hours
Accurate sleep duration is the most predictive variable. Use your phone's health app or a fitness tracker to get precise data if possible.
03
Add a daily note
Notes give context to the numbers. 'High stress day — presentation' explains a mood dip far more than a number alone.
04
Review the correlation chart
After 2+ weeks, the chart overlays mood and sleep data. Most people discover a 24–48 hour lag — poor sleep affects mood the next day, not the same day.
05
Look for your personal patterns
Some people are highly sensitive to sleep disruption; others are resilient. Some are morning people; some need time to warm up. Your data reveals your personal patterns.
💡
💡 The single highest-impact sleep intervention is consistent wake time — even on weekends. Your body's circadian rhythm is anchored to wake time, not bedtime.