Track What's Causing Your Brain Fog
Brain fog has dozens of possible causes — sleep debt, food sensitivities, supplements, stress, dehydration, hormones, inflammation. The only way to find YOUR triggers is to track them systematically.
Brain Fog Is Real — But The Cause Is Different For Everyone
Brain fog affects millions of people. Whether you're dealing with lingering post-COVID symptoms, perimenopause, ADHD, autoimmune conditions, or simply the aftermath of poor sleep, the experience is the same: mental cloudiness, difficulty concentrating, memory lapses, and a frustrating sense of working below your baseline.
The problem is that doctors often dismiss it. Neurologists order tests that come back normal. Your friends suggest generic advice — "sleep more, eat healthier, exercise" — that doesn't address YOUR specific situation.
The breakthrough: your brain fog has personal triggers. For some people it's a specific food. For others it's sleep architecture, or blood sugar crashes, or stress-induced cortisol spikes, or hormonal fluctuations. The only way to find YOUR pattern is to track systematically and look for correlations.
How It Works in 3 Steps
Find your brain fog triggers through systematic daily tracking.
Rate Your Mental Clarity
Each morning and evening, rate your brain fog and mental clarity on a simple scale (1-10). This establishes your baseline and tracks how your clarity fluctuates day to day and week to week.
Log Your Potential Triggers
Every day, log the inputs that might affect your clarity: hours slept and quality rating, meals and ingredients, supplements taken, caffeine and alcohol, stress level, exercise, hydration, and other variables. ReactLog integrates with Apple Health to pull in biometric data automatically.
Discover Your Correlations
After 2-3 weeks of consistent tracking, patterns emerge. ReactLog's correlation engine shows you which inputs correlate most strongly with your brain fog. You'll see concrete evidence of your personal triggers.
Track Everything That Affects Your Mental Clarity
ReactLog adapts to your unique brain fog pattern. Track any combination of these:
Sleep Quality & Duration
Sleep hours, quality ratings, and wake cycles
Food & Sensitivities
Meals, ingredients, and trigger foods
Stress & Mood
Daily stress levels, mood rating, and emotional state
Mental Clarity Rating
Brain fog level, focus quality, and cognitive performance
Exercise & Activity
Workout type, duration, and intensity
Supplements & Medications
All supplements, medications, and dosages
Hormonal Changes
Menstrual cycle, perimenopause, and hormone levels
Hydration & Caffeine
Water intake and caffeine consumption
Your Brain Fog Data Stays on Your Phone
Why privacy matters for sensitive brain fog tracking.
Your brain fog tracking reveals things about you that are deeply personal: mental health struggles, hormonal issues, chronic illness, medication side effects, vulnerabilities. You don't want that data on someone else's server.
Traditional apps sell your health data to data brokers, insurance companies, and advertisers. ReactLog takes a fundamentally different approach:
- No backend servers — Your data lives on your device only. Period.
- No analytics SDKs — We don't send telemetry about your usage patterns.
- No data collection — We have nothing to collect. No servers means no data pipeline.
- No account required — You don't need to create a login. No username, no email, nothing that identifies you.
- Face ID/Touch ID lock — Your brain fog data is biometrically protected on your phone.
We charge for the app instead of charging you with your privacy. It's a sustainable business model that aligns our interests with yours.
Frequently Asked Questions
What causes brain fog?
Brain fog has many potential causes: poor sleep quality or duration, food sensitivities (gluten, dairy, histamine, eggs), blood sugar crashes, dehydration, nutrient deficiencies (B vitamins, iron, magnesium, vitamin D), chronic stress and elevated cortisol, hormonal changes (menstrual cycle, perimenopause, thyroid), inflammation, medication side effects, screen time and blue light exposure, and post-viral conditions like long COVID. The key insight is that YOUR brain fog likely has specific, personal triggers that may be different from the standard generic advice.
How do I track brain fog effectively?
Effective brain fog tracking involves: (1) Rate your mental clarity and fog level daily on a consistent scale (e.g., 1-10). (2) Log potential triggers that could affect your clarity — sleep hours and quality, meals and foods, supplements, stress levels, exercise, water intake, hormone tracking, caffeine and alcohol consumption. (3) Track this consistently for 2-3 weeks so patterns emerge. (4) Review correlations: which days had the worst fog, and what preceded them? This systematic approach reveals YOUR personal triggers far more effectively than guessing or following generic advice.
Can brain fog tracking actually help me feel clearer?
Yes, significantly. Once you identify your personal triggers through tracking, you can eliminate or manage them intentionally. Many ReactLog users discover that specific foods cause brain fog within hours, or that sleep quality is the dominant factor, or that stress management reduces cognitive cloudiness. By targeting YOUR specific triggers rather than following generic advice, you see real improvement in mental clarity, focus, and cognitive function. The difference is: you're not guessing anymore, you're working with data about your own body.
Is ReactLog free and really private?
Yes to both. ReactLog is free during Early Access — no subscription required. And it's 100% private by design. All data stays on your iPhone, completely off-device. There are no backend servers, no data collection, no cloud storage, and no analytics tracking your health. Your sensitive brain fog and health data never leaves your phone. No one — not us, not advertisers, not hackers — can access your tracking history.
Why is privacy important for brain fog tracking?
Brain fog often accompanies deeply personal conditions: mental health challenges, hormonal issues, chronic illness, post-viral syndromes, or medication use. This data is intimate and sensitive. You deserve an app that respects that privacy — where your brain fog patterns, medication logs, and health data remain completely yours, never sold or analyzed by third parties. That's why ReactLog is built with zero data collection and keeps everything on-device. Your health data is yours alone.
Find Your Brain Fog Triggers.
Start Tracking Today.
Free during Early Access. No account required. Your brain fog data stays on your phone.