Loved by 300,000+ people

Your ME/CFS health assistant

An ME/CFS symptom tracker that helps you see crashes coming. Log energy and PEM, and find your energy envelope.

The Juno app home screen with a weekly insight about crashes

A woman lying on a sofa, resting with her eyes closed — Rest dayCrashed after yesterday. Resting all day.

Features

Built for the everyday reality of managing Myalgic Encephalomyelitis.

Juno is designed to take some of the admin load off with calmer check-ins, clearer pattern tracking, and support that stays useful between appointments.

Flare support

Manage flares

Keep one calm place for what changed, what felt worse, and what might have triggered it so me/cfs flare days do not blur together.

Track what changed and when
Keep notes in plain language
Spot context around tougher days

The Juno symptom tracker with me/cfs symptoms logged today

Low-effort tracking

Track symptoms automatically

Voice or text check-ins turn energy levels (morning vs evening), pem episodes (onset, severity, duration), sleep continuity and refreshment into a structured timeline, so you do less manual logging on already hard days.

Turn check-ins into clear logs
Keep details without filling forms
Build a timeline for appointments

A chat with Juno where a me/cfs symptom is logged

Community

Join a community of 300,000+

Find people who understand the day-to-day reality of me/cfs and feel less alone between appointments.

Feel less alone between visits
Read what helps other people cope
Stay connected on lower-energy days

Juno Community feed with posts about me/cfs

Energy pacing

Manage your energy

See what is draining you and pace the week more gently around me/cfs, especially when triggers start to stack up.

Protect tomorrow before it crashes
Notice patterns around triggers
Plan the week around your baseline

Juno pace screen showing remaining energy

From people using Juno

@paulasojoroTikTok • 350K followers

Made by Juno

@singlewithmsInstagram • 117K followers

Made by Juno

Such an incredible help

I was recently diagnosed with MS, and Juno has been a lifesaver. It helps me track everything from sleep to pain and remember what to tell my doctor.

Lvhb

Anxiety killer

Facing a doctor and needing to be assertive is hard. Juno helps me put questions into words and think more clearly about pacing.

Ginmail

Game changer

It feels like having someone who understands chronic illness with me all the time. Juno logs symptoms, remembers what helped before, and keeps cheering me on.

Jay-B23

Really great app

I can talk naturally while Juno quietly logs symptoms, mood, pain, and what I need to raise with my doctor. Tracking everything finally feels easy.

HnAWhite

Complex illness support

This is the first app that has been able to juggle all of my chronic illnesses. It helps with symptom logging, spotting correlations, and preparing for appointments.

Old ink fan

Genuinely helpful

It has actually helped me log things and understand the data myself. Sometimes Juno makes connections in my symptoms that I would have missed.

greencarnationwitch

Less alone

I have Multiple Sclerosis, and Juno has genuinely changed how I manage my days. It helps me pace my energy, track symptoms, and feel heard when I'm struggling.

kbreault421

Amazing for pacing

I had been desperate for something to track symptoms, activities, medications, and mood. Juno gives me clearer data to bring into my doctor appointments.

Lpopp3

Reviews are excerpts from published App Store reviews, lightly trimmed for length; we verify each quote against its source review and do not display incentivised reviews. Individual experiences — results vary, and Juno does not provide medical care or diagnose, treat, or prevent any condition.

Quick answer

What is the best way to track Myalgic Encephalomyelitis symptoms?

The best way to track ME/CFS is to separate symptoms by domain, log what changed when it happened, and connect each entry to triggers, treatment, and daily impact. Juno turns low-effort voice or text check-ins into a timeline your ME/CFS specialist or GP can review.

On a low-energy day, the free symptom tracker takes a few taps and keeps entries on your device.

Crashing a day or two after doing too much? Read why you crash 24 hours after activity.

Planning around limited energy? Compare the best pacing apps, or print the free Spoon Diary.

Foggy a day after a busy day? Read what causes brain fog and how to pace thinking work.

Curious what your HRV means? Use our HRV by age checker to compare your number with healthy adults.

Symptom timing
Possible triggers
Treatment response
Appointment questions

What should your Myalgic Encephalomyelitis symptom tracker record?

A strong ME/CFS tracker records separate symptom domains, timing, triggers, treatment context, and functional impact. For ME/CFS, the most useful entries are energy levels (morning vs evening), pem episodes (onset, severity, duration), sleep continuity and refreshment, cognitive load, physical activity.

How does tracking ME/CFS help at appointments?

Tracking gives your ME/CFS specialist or GP a cleaner timeline than memory can provide. It turns scattered day-to-day notes into onset, duration, recovery, possible triggers, medication context, and the questions you need answered.

When should new ME/CFS symptoms be escalated?

New, sudden, severe, or worsening symptoms should be shared with your clinical team promptly, especially when they affect daily safety, function, medication response, or a body system your care team is already monitoring. Juno helps you record what changed, but your clinician decides what needs urgent care.

What should you log?

Energy levels (morning vs evening)
PEM episodes (onset, severity, duration)
Sleep continuity and refreshment
Cognitive load
Physical activity
Crash recovery time
Emotional load
Symptom flares

What patterns matter?

Activity load in the 24–72 hours before PEM
Sleep refreshment vs daytime energy
Recovery time after physical, cognitive, or emotional load
Triggers stacking inside the same week

What should you bring?

Energy and PEM trends since the last visit
Pacing data with adherence notes
A crash log with duration and recovery markers
Medication and supplement responses
Questions on pacing, comorbidities, or accommodations

Tracker comparison

What makes Juno different from a generic tracker?

Generic trackers often flatten complex symptoms into one daily score. Juno keeps the details separate enough for pattern recognition and clear enough for appointments.

Need	Generic tracker	Juno
PEM-aware logging	No PEM concept at all	Onset, severity, and 24–72h delayed-trigger view
Energy envelope	Step counts you can't sustain	Your sustainable load, in your own units
Pacing without spreadsheets	Manual graphs you build yourself	Plain-language summaries of activity vs recovery
Cognitive crashes	Lumped under 'fatigue'	Cognitive vs physical PEM tracked separately
Bad-day friendly	Punishes you for skipping	One-tap check-ins, skippable

Key benefits

Four ways Juno makes life with Myalgic Encephalomyelitis a little easier.

Spot ME/CFS flare patterns sooner

Track shifts in energy levels (morning vs evening), pem episodes (onset, severity, duration), sleep continuity and refreshment, cognitive load before they blur together by the next appointment.

Track symptoms automatically

Tell Juno what happened in plain language and it turns that into a clear symptom timeline without extra admin.

Protect your energy

See what tends to push you past baseline so you can pace the week with less guesswork around me/cfs.

Show up prepared

Turn daily notes, symptom changes, and context into something your ME/CFS specialist or GP can actually use.

Private and secure.

Health conversations are personal. Juno is built so your notes, symptoms, and timeline stay yours.

Your health data should not feel exposed.

Conversations are encrypted and kept private.

We do not sell your personal health information.

You can review, export, or delete your data at any time.

Read the privacy policy

From daily notes to your appointment

Explore ways to track your symptoms and review a fictional appointment report before deciding what to bring to your clinician.

FAQs

A few common questions.

What is ME/CFS?

ME/CFS is a complex, long-term illness characterised by profound fatigue, post-exertional malaise (PEM), unrefreshing sleep, cognitive impairment, and orthostatic intolerance. Symptoms must persist for at least six months for diagnosis under common criteria.

What is PEM and why track it?

Post-exertional malaise is a worsening of symptoms after physical, cognitive, or emotional exertion that would not have caused a problem before illness. PEM can be delayed by 24–72 hours, which is exactly why a tracker that holds the timeline matters.

Will tracking help me find my energy envelope?

It helps you see what's sustainable in your own data. Most people start to see a clearer envelope after 2–3 weeks of light, honest check-ins.

What if I'm too fogged to write much?

Check-ins are designed to take under a minute. On heavy fog days, you can pick from short prompts instead of typing.

Is Juno a substitute for ME/CFS care?

No. Juno is a tracker and companion. It helps you and your specialist or GP have a clearer conversation — it does not diagnose or treat.

What is the best app for tracking ME/CFS?

If you want heart-rate pacing with a wearable, Visible is built for it; if you would rather log crashes by voice or text and plan your day with spoon estimates, Juno does that without a band. Our guide to the best apps for ME/CFS and long COVID compares both, along with Bearable and Guava.

Other conditions

A woman sitting up in bed, silhouetted against warm evening light.

Get started with Juno.

Download the app to track symptoms, spot patterns, and feel more supported between appointments.