Comparison

CFS Tracker vs SONA VNS

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

CFS Tracker

This app helps individuals manage energy-limiting chronic illnesses by tracking symptoms, pacing, medications, and daily activities. It provides insights into patterns and trends to better understand health and communicate with healthcare providers.

Highlights
  • Log diverse symptoms including fatigue and brain fog
  • Track medications, supplements, and treatments
  • Record activity, rest, sleep, and nutrition
  • Customize tracking for personal health patterns
  • Set reminders for health routines
  • Monitor post-exertional malaise (PEM) and crashes
  • Review symptom trends with charts and summaries
Features
Read full description

Feeling overwhelmed by chronic fatigue, brain fog, low energy, and unpredictable symptoms? Cifora is a dedicated CFS/ME tracker and chronic fatigue journal built for energy-limiting conditions. Track symptoms, pacing, PEM patterns, medications, supplements, sleep, mood, pain, activity, and rest, alongside Apple Health data, in one simple place. Living with an invisible illness often means balancing activity, rest, routines, treatments, appointments, and daily responsibilities. Cifora helps you organize your health notes and review your own patterns over time, so you can keep clearer records of difficult days, flares, PEM, and crashes. Built for people tracking ME/CFS, chronic fatigue syndrome, myalgic encephalomyelitis, long COVID, post-viral fatigue, fibromyalgia, POTS, dysautonomia, migraines, MCAS, IBD, chronic pain, anxiety, depression, and other complex multisystem, energy-limiting conditions. Key features: 1. Log symptoms including fatigue, brain fog, muscle pain, joint pain, headaches, dizziness, nausea, palpitations, insomnia, sleep issues, post-activity symptoms, and other invisible symptoms 2. Track medications, supplements, treatments, care routines, appointments, and personal health notes 3. Record activity, rest breaks, sleep quality, hydration, nutrition, mood, pain, social activity, and daily energy levels 4. Customize your symptom tracker around your own health, pacing, fatigue, and energy patterns 5. Set reminders for medications, supplements, symptom check-ins, hydration, sleep, rest, and routine tracking 6. Keep a record of post-exertional malaise (PEM) patterns, energy dips, symptom flares, and energy crashes over time 7. Review charts and summaries of symptom trends across mild, moderate, severe, crash, and recovery days 8. Keep a connected health record Everything is designed for low cognitive load. Quick entries, customizable fields, reminders, charts, summaries, and reports help you stay consistent without feeling overwhelmed, even during high fatigue or brain fog. Use Cifora to keep clearer records, prepare for appointments, organize invisible symptoms, understand your own history, and communicate more clearly with your healthcare providers. Whether you are tracking mild, moderate, or severe days, Cifora gives you a flexible structure for daily chronic fatigue and ME/CFS tracking across energy, symptoms, sleep, pain, activity, rest, medications, supplements, nutrition, hydration, mood, and appointments. Your data stays private, encrypted, and under your control. You can export your records or delete your account at any time. We do not sell your health information to third parties. Disclaimer: Cifora is for tracking, journaling, educational, and informational purposes only. It is not a medical device and does not provide medical advice, diagnosis, or treatment, and is not intended to diagnose, treat, cure, prevent, or monitor any disease or medical condition. Always seek a doctor's advice in addition to using this app and before making any medical decisions, including before changing medications, supplements, treatments, activity levels, or care routines. EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

SONA VNS

This app guides personalized, non-invasive vagus nerve stimulation sessions to support relaxation, sleep, and cognitive function. It tracks progress with analytics and integrates with wearables for deeper insights into your wellness journey.

Highlights
  • Personalized journey sessions
  • Daily taVNS for stress recovery
  • Guided audio and breathing exercises
  • Heart rate and HRV analytics
  • Wearable device integration
  • Progress tracking and streaks
Features
Read full description

Unlock your potential with SONA, the companion app for personalized, non-invasive transcutaneous auricular vagus nerve stimulation (taVNS) using the SONA consumer wellness earpiece. Engage in carefully designed journey sessions to support relaxation, improve sleep, and enhance cognitive performance. Each session combines guided audio, breathing exercises, and adaptive taVNS stimulation for a complete wellness experience. Track your progress with detailed analytics, monitor trends in your Heart rate and Heart Rate Variability (HRV), and maintain daily session streaks. For deeper insights, SONA integrates seamlessly with popular wearable devices such as Whoop and Oura. (SONA is not a medical device and is not intended for diagnosing, treating, mitigating, preventing, or curing any disease or medical condition). Key features: * Personalized Journey Sessions: Structured programs designed to address specific user needs. * Daily taVNS: Quick, regular sessions for ongoing stress recovery, improving sleep and cognitive maintenance. * Multi-Sensory Experience: Sessions feature guided audio, breathing instructions, and concurrent taVNS stimulation. * Performance Analytics: View detailed metrics on heart rate, heart rate variability, breathing rate, and other key stats. * Progress Tracking: Track your usage and progress, and unlock advanced features with session completion.

Screenshots

CFS Tracker4 screens
SONA VNS4 screens

Verdict

The call

The clearest difference is rating: CFS Tracker at 3.0 against SONA VNS's 2.0. CFS Tracker also leads on device support (4 vs 2). SONA VNS's advantage is in-app purchases (none vs 16) and update cadence (fortnightly vs every 8 months). On price, ratings volume, ads and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. CFS Tracker sells 16 in-app purchases, starting at $4.95 per month. SONA VNS asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

CFS Tracker holds the better App Store score, 3.0 against 2.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

UpkeepUpdate frequency

CFS Tracker ships an update every 8 months, SONA VNS fortnightly. The most recent releases landed on September 9, 2026 and August 29, 2026 respectively.

Scorecard5 real differences · 4 level
CFS Tracker versus SONA VNS: the parameters behind the verdict, then further details
ParameterCFS TrackerSONA VNS
PriceFreeFree
Rating3.0 (2 ratings) — better2.0 (1 ratings)
Number of ratings2 — better1
Update frequencyEvery 8 monthsFortnightly — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, iPod
Requires iOS15.515.1 — better
Further details — not scored
Size219 MB119 MB
Age rating4+12+
DeveloperClarity Digital Therapeutics IncMindspire Limited

Customer experience

CFS Tracker

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%

SONA VNS

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

16 purchases

CFS Tracker

Subscriptions13
  • flex pass$4.951 Month
  • easy pass$5.997 Days
  • flex pass$8.991 Month
Show 10 more
  • carey ai max$19.991 Month
  • yearly access$19.991 Year
  • smart pass$24.991 Year
  • carey ai ultra$29.991 Month
  • plus$29.991 Year
  • limited discount$29.991 Year
  • Premium Yearly$34.991 Year
  • yearly access3 Days trial$39.991 Year
  • Extended Trial3 Days trial$39.991 Year
  • 7-Day Trial7 Days trial$49.991 Year
One-time3
  • store credit$1.99
  • carey ai credits$8.99
  • lifetime upgrade$99.99
None

SONA VNS

No in-app purchases

Questions

Is CFS Tracker free?
CFS Tracker is free to download, with in-app purchases available.
Is SONA VNS free?
SONA VNS is free to download, with no in-app purchases.
Which has better reviews, CFS Tracker or SONA VNS?
CFS Tracker is rated higher. CFS Tracker averages 3.0 out of 5 from 2 ratings, while SONA VNS averages 2.0 from 1 ratings.
Do CFS Tracker or SONA VNS have ads?
Neither CFS Tracker nor SONA VNS shows ads.
Which is updated more often, CFS Tracker or SONA VNS?
CFS Tracker ships an update every 8 months, and SONA VNS fortnightly. Most recently, CFS Tracker was updated on September 9, 2026 and SONA VNS on August 29, 2026.

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