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Track your brain fog and see what comes before it

Brain fog is hard to explain and even harder to remember on a foggy day. Heylixir is a symptom tracker app that lets you log how foggy you feel in seconds, by voice or tap, next to your sleep, meds, mood and flares, so you can see what tends to come before your foggiest days.

Heylixir journal screen where you log brain fog and how it affects your day

Brain fog is hard to explain, easy to log

Word-finding trouble, losing your train of thought, reading the same line three times: brain fog shows up differently every day and rarely at a convenient moment. By the time you are asked about it at an appointment, the details are gone.

In Heylixir you rate how foggy you feel and add a few words about what it is doing to your day. It takes seconds, so you can log it while it is happening instead of trying to remember it later.

Rate your brain fog with intensity and a short note

Add what it affected: work, conversations, reading

Keep it next to your other symptoms

Heylixir insights screen showing patterns between sleep, symptoms and brain fog

Spot what comes before your foggy days

Brain fog rarely arrives alone. Poor sleep, a flare, a late dose, a stressful week or a big day out can all play a part. Because Heylixir keeps your sleep, symptoms, mood, meds and journal in one place, you can look back and notice what tends to come before foggy days.

Halo AI points out patterns in your own logs in plain language, so you do not have to dig through every entry. Patterns are not a diagnosis, but they give you something concrete to talk through with your care team.

Sleep and brain fog side by side

Meds and timing next to how clear you feel

Patterns in your own logs, in plain language

Heylixir voice tracking screen for logging brain fog by voice

Log by voice when the words will not come

Typing through a foggy day is its own kind of hard. With voice tracking you just say how you feel, something like "Foggy since I woke up, could not focus, slept badly, took my meds late", and Heylixir fills in your mood, symptoms, meds and journal for you.

Accuracy may vary by language, accent and how clear your audio is, so give your entry a quick look before you save it. Tracking with Heylixir is meant to be easy, fast and painless, even on hard days.

Heylixir logo

Log brain fog with your voice

When the fog is thick, typing is the last thing you want to do. Say how you feel in Heylixir and your voice note does the logging for you.

“Foggy since I woke up, could not focus, slept badly, took my meds late.”

Mood: frustrated, foggy

Symptoms: brain fog, fatigue

Medication: taken, noted with the time

Journal: your words, saved as today's entry

See how voice tracking works →

Keep exploring

Voice symptom tracking →Say how you feel and Heylixir logs it for you.Long COVID symptom tracker app →Track fatigue, brain fog and crashes.Fibromyalgia symptom tracker app →Track pain, fibro fog and flares.POTS symptom tracker app →Track dizziness, brain fog and heart rate.Dizziness & heart-rate tracking →Log dizzy spells next to your readings.Flare-up trigger tracking →Find what tends to come before a flare.Pain & fatigue tracking →Track pain and energy levels.Doctor summary →Share a clear summary of how you have been doing.

Ready to know what is behind your fog?

Try Heylixir and start logging brain fog in seconds, so you have real patterns to look back on.

Think this could help a friend?

FAQ: brain fog tracking

Brain fog is a common way people describe trouble thinking clearly: slowed thinking, poor concentration, memory lapses or struggling to find words. It is not a diagnosis on its own, and it shows up with many conditions, including fibromyalgia, ME/CFS, Long COVID, POTS, lupus and more.
Log it the same way each time: a rating for how foggy you feel, the time of day and a short note on what it affected. Heylixir lets you do this by voice or tap, and keeps it next to your sleep, meds, mood and other symptoms so you can compare.
Sleep, medication timing, other symptoms like fatigue or pain, stress, food and activity are good starting points. You do not need to log everything. A few consistent notes beat a perfect log you give up on.
No. Heylixir helps you notice patterns in your own logs, such as what tends to come before foggy days. Insights are not a diagnosis or medical advice, so talk to your healthcare provider about what you see.
Yes. Heylixir's voice tracking lets you say how you feel and turns it into mood, symptom, medication and journal entries. Accuracy may vary by language, accent and audio quality, so check your entry before saving.
Heylixir can create a clear summary of how you have been doing that you can bring to appointments, so you can describe your brain fog with dates and patterns instead of trying to remember.
Yes. Brain fog is common across many conditions, and Heylixir is built for chronic illness in general. See our Long COVID, POTS and fibromyalgia symptom tracker pages for condition-specific details.
Yes. In Heylixir you just say how you feel and Heylixir logs your mood, symptoms, meds and journal for you. Read more about voice symptom tracking.
Yes. Tracking with Heylixir is meant to be easy, fast and painless, even on hard days. You can lie back, say a few words, give your entry a quick look and save it, with no forms to fill in.
Voice tracking supports around 100 languages. Accuracy may vary by language, accent and how clear your audio is, so give your entry a quick look before you save it. See the full list on our voice tracking page.
Yes. Voice tracking works offline, so you can log when you have no signal and your entry is there when you are back online.

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Heylixir for..

For Endometriosis
For POTS (Postural orthostatic tachycardia syndrome)
For Diabetes
Long COVID tracking & support
Fibromyalgia tracking & support
PCOS Symptom Tracking & Support
Mood & Journal Tracking
Symptoms & Medications
Stress, anxiety & depression
Mental health support & tracking
How to Track Mood & Journal
How to Track Symptoms & Medications
Flare-Up Management with Heylixir
Chronic illness flare ups
Chronic illness support community
How to use journaling prompts
AI Wellness Insights
Wellness Reminders
Christmas Offer
How to Track Chronic Illness
Why Tracking Your Health Matters
Voice Symptom Tracking
Spoon Theory Energy Tracking
Doctor Summary
Best Chronic Illness Apps
Heylixir vs Bearable
Heylixir vs Visible
Heylixir vs Guava
Bearable Alternatives
Visible Alternatives
Guava Alternatives
Heylixir vs CareClinic
Heylixir vs Flaredown
Heylixir vs Daylio
CareClinic Alternatives
Flaredown Alternatives
Daylio Alternatives
Brain Fog Tracker
Migraine Tracking App
Dizziness & Heart Rate Tracking
Flare-Up Trigger Tracking
Symptom Tracker App
Free Chronic Illness Tracker Apps
What Is Spoon Theory?
Spoon Theory Planner
ME/CFS Symptom Tracker App
Lupus Symptom Tracker App
Ehlers-Danlos Symptom Tracker App
IBS & Crohn's Symptom Tracker App
MS Symptom Tracker App
Rheumatoid Arthritis Symptom Tracker App
Symptom Diary Template
Doctor Appointment Checklist
Living With Chronic Illness as a Student
Living With Chronic Illness at University
Living With Chronic Illness and Working 9 to 5

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