Comparison

TachyMon vs Heylixir

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

Head to head
About

TachyMon

Receive immediate alerts for significant heart rate fluctuations, ideal for conditions like POTS or during exercise. Customize thresholds and receive detailed event tracking. Premium features offer advanced data visualization and reporting.

Highlights
  • Customizable heart rate threshold alerts
  • Haptic feedback for alerts
  • Real-time heart rate and average display
  • Alert event tracking and logging
  • Temporary alert silencing
  • Detailed monitoring data review
  • Shareable PDF reports (premium)
Features
Read full description

Get rapid alerts for significant heart rate changes due to POTS, tachycardia, exercise or other activities. Features: - Haptic alerts based on custom threshold levels. - Customizable upper and lower threshold levels for current heart rate and difference from recent average. - The main display shows: current heart rate, moving average of recent heart rate, and delta of current heart rate to average. - Display colors change to show severity of alert. - The app tracks alert events with start time of event, event duration, starting average heart rate, and maximum or minimum heart rate during event. - Triple tap to temporarily silence alerts. - Review detailed monitoring data on the companion iPhone app. Premium features: - View detailed heart rate chart for each event - Share event info directly from watch, or export from iPhone to Photos app - Run monitoring sessions directly on your iPhone, without an Apple Watch, by connecting a Bluetooth heart rate sensor - Generate a shareable PDF report for each session - Add notes and symptoms to Alert Events - Export Alert Event raw heart rate data to .csv - View live session data on the iPhone companion app - View a summary of Alert Events over last week / month / year TachyMon was created by the developer for his niece Alex, who was diagnosed with Postural Orthostatic Tachycardia Syndrome (POTS) in the fall of 2021. Alex was experiencing frequent fainting, and her family noticed the episodes often followed a rapid rise in her heart rate. She wanted a heads-up the moment that started happening. Alex uses TachyMon's alerts as a cue to sit or crouch down when her heart rate climbs quickly, and she finds the app helps her feel a bit more in control of her day. It is a simple but specialized app, and we hope it may help others with POTS, or anyone who wants to be alerted to changes in their heart rate. APPLE HEALTH TachyMon integrates with the Apple Health app. TachyMon stores workout information (including heart rate) with the Apple Health app. WARNING: It is important to consult with medical professionals if you are concerned about your health. The TachyMon app is intended for informational purposes only. It is not a substitute for specialized medical care. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Heylixir

Track symptoms, mood, medications, and sleep to understand chronic illness triggers and patterns. Gain personalized health insights and connect with supportive communities. Manage your well-being with reminders and routines.

Highlights
  • Symptom and medication tracking
  • Mood and sleep logging
  • Guided journaling prompts
  • Personalized health insights
  • Supportive online communities
  • Medication and appointment reminders
Features
Read full description

Heylixir – Track symptoms, mood, meds & journal to understand your chronic illness & flare triggers and patterns. Managing a chronic condition can feel overwhelming. Heylixir is your wellness companion that helps you track symptoms, mood, medications, sleep, and flare-ups, with supportive communities and Halo AI insights that highlight patterns and triggers so you can feel more in control of your health. Whether you’re navigating endometriosis, POTS, fibromyalgia, long COVID, diabetes, PCOS, IBS, Crohn’s, ulcerative colitis, rheumatoid arthritis, migraines, chronic fatigue syndrome (ME/CFS), autoimmune disorders, thyroid conditions, asthma, chronic pain, chronic depression or another chronic condition, Heylixir gives you a clearer view of what your body is telling you. SYMPTOM & MEDICATION TRACKING Track symptoms, flare-ups, medications, dosages, and triggers with fast, simple inputs. Record how you feel each day and note changes over time. Generate clear summaries for appointments, understand what worsens or relieves symptoms, and stay consistent with medication reminders so you never miss a dose. MOOD & SLEEP TRACKING Track your mood and sleep alongside physical symptoms to see how they influence each other. Use guided journaling prompts or quick check-ins to update how you’re feeling, calm your mind, and understand what helps you feel more steady and supported. JOURNALING & SELF-REFLECTION Journal with thoughtful prompts to reflect on your day. Log wins, worries, frustrations, and flare-ups, everything that expresses how you feel. Heylixir helps connect your symptoms, emotions, routines, and stress levels so you can notice hidden patterns you may miss. PERSONALIZED HEALTH INSIGHTS & WELLNESS ANALYTICS Heylixir turns your mood, symptoms, sleep, stress, medications, and journal entries into clear, actionable insights. It uncovers meaningful patterns, like what triggers flare-ups, what helps fatigue, or how sleep impacts pain, and gives small, practical suggestions based on your real data. Explore visual trend-lines, weekly and monthly summaries, and detailed reports that reveal correlations such as fatigue vs. sleep quality or pain vs. stress. SUPPORTIVE COMMUNITIES & GROUPS Community matters when you’re managing a chronic condition. Join groups, and events that help you build routines and reduce the isolation that chronic illness often brings. Connect with people who understand what you’re navigating. REMINDERS & ROUTINES Set reminders for medications, appointments & check-in. Let Heylixir take the mental load while you stay consistent without extra effort. FOR CHRONIC CONDITIONS Heylixir supports individuals managing: Endometriosis, POTS, fibromyalgia, long COVID, PCOS, diabetes, IBS, Crohn’s, ulcerative colitis, migraines, chronic fatigue syndrome (ME/CFS), asthma, autoimmune conditions, thyroid disorders, arthritis, chronic pain, hypertension, dysautonomia, and more. Track symptoms, mood, flare-ups, energy, pain levels, and medication. Halo AI reveals meaningful trends so you can walk into appointments feeling prepared, informed, and confident. MENTAL HEALTH & OVERALL WELLNESS Wellness is emotional as much as physical. With mood tracking, sleep insights, guided journaling, and stress reflection, Heylixir helps you understand how your body and mind influence each other. YOUR PRIVACY, OUR PRIORITY Your data belongs to you. Heylixir uses strong security protections, including biometric lock, end-to-end encryption, and a transparent privacy policy. WHY HEYLIXIR? Heylixir brings your health into one place, journaling, tracking mood, symptoms, medication reminders, sleep insights, helping you learn your flare triggers and patterns. Start understanding your symptoms, patterns, and triggers with clarity. Download Heylixir today and take control of your wellness. For Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Need help? Email: contact@heylixir.com

Screenshots

TachyMon4 screens
Heylixir4 screens

Verdict

The call

The clearest difference is rating: Heylixir at 5.0 against TachyMon's 3.8. Heylixir also leads on update cadence (fortnightly vs every 3 months) and iOS requirement (13.0 vs 16.4). TachyMon's advantage is ratings volume (287 vs 1). On price, ads, in-app purchases and monetization model 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. TachyMon sells 2 in-app purchases, starting at $2.99 per month and Heylixir sells 6 in-app purchases, starting at $8.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Heylixir holds the better App Store score, 5.0 against 3.8. That said, the two scores are not equally well evidenced: TachyMon has 287 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

TachyMon ships an update every 3 months, Heylixir fortnightly. The most recent releases landed on October 23, 2026 and September 23, 2026 respectively.

Scorecard4 real differences · 6 level
TachyMon versus Heylixir: the parameters behind the verdict, then further details
ParameterTachyMonHeylixir
PriceFreeFree
Rating3.8 (287 ratings)5.0 (1 ratings) — better
Positive reviews58.0% of reviews—
Number of ratings287 — better1
Update frequencyEvery 3 monthsFortnightly — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhone, Apple WatchiPhone, iPad, iPod — better
Requires iOS16.413.0 — better
Further details — not scored
Size36 MB66 MB
Age rating9+17+
DeveloperWhip Development Inc.Aurora Vicci LLC

Customer experience

TachyMon

All ratings286 ratings
Positive69.2%
Neutral5.2%
Negative25.5%
Written reviews207 reviews
Positive58.0%
Neutral13.0%
Negative29.0%

Heylixir

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

TachyMon

Reported bugs

4 issues
  • Frequent disconnections from heart rate monitor
  • Inconsistent data sync between watch and phone
  • Inability to reinstall app on new devices
  • Freezing and crashing issues on latest updates

Requested features

5 requests
  • Add ability to log symptoms and notes
  • Implement emergency contact alerts
  • Improve data export and sharing options
  • Enhance graphing and trend analysis tools
  • Optimize battery usage and background monitoring

Heylixir

Not enough reviews yet to summarise bugs or requests.

In-app purchases

2 purchases

TachyMon

Subscriptions2
  • TachyMon Premium Monthly1 Month trial$2.991 Month
  • TachyMon Premium Annual1 Month trial$19.991 Year
6 purchases

Heylixir

Subscriptions6
  • Standard Monthly7 Days trial$8.991 Month
  • Monthly Pro7 Days trial$14.991 Month
  • Standard Monthly (3 Months)7 Days trial$38.993 Months
Show 3 more
  • Monthly Pro (3 Months)7 Days trial$59.993 Months
  • Standard Annual14 Days trial$155.991 Year
  • Pro Annual14 Days trial$239.991 Year

Questions

Is TachyMon free?
TachyMon is free to download, with in-app purchases available.
Is Heylixir free?
Heylixir is free to download, with in-app purchases available.
Which has better reviews, TachyMon or Heylixir?
Heylixir is rated higher. TachyMon averages 3.8 out of 5 from 287 ratings, while Heylixir averages 5.0 from 1 ratings.
Do TachyMon or Heylixir have ads?
Neither TachyMon nor Heylixir shows ads.
Which is updated more often, TachyMon or Heylixir?
TachyMon ships an update every 3 months, and Heylixir fortnightly. Most recently, TachyMon was updated on October 23, 2026 and Heylixir on September 23, 2026.

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