Comparison

TachyMon vs Juno

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

Juno

This app provides a non-judgmental companion for individuals living with chronic illnesses. It offers a safe space to discuss symptoms, track health data, and gain insights without unsolicited advice. Designed by those who understand, it offers personalized support for daily challenges.

Highlights
  • AI-powered chronic illness companion
  • Symptom and energy level logging
  • Pattern and trigger identification
  • Health diary and insights
  • Voice or text conversations
  • Personalized condition support
Features
Read full description

Meet Juno, your personal health assistant for life with chronic illness - trusted by over 250,000 users globally. Text Juno the same way you would message a friend. Say, “My migraine is 7 out of 10 and started after lunch,” and Juno can log the symptom, severity, and context for you. Prefer talking? Use voice instead. Juno brings compassionate support, symptom tracking, medication management, energy pacing, health insights, and community into one place—without making you complete another exhausting form. LOG SYMPTOMS BY TEXT OR VOICE Too tired for forms? Simply describe what is happening in your own words. Use Juno to: - Log symptoms, pain, mood, energy, and health notes through conversation - Record symptom severity and useful context without navigating long forms - Talk through a difficult symptom day or 3 AM flare - Remember details from your health journey - Prepare questions and talking points for medical appointments Juno personalizes support using the conditions, symptoms, and routines you choose to share, so you don’t have to explain everything again each time. No toxic positivity. No judgment. No pressure to “push through.” Juno meets you where your energy is today. TRACK SYMPTOMS AND SPOT PATTERNS Build a simple health diary that works even through fatigue, pain, and brain fog. - Review your symptom history and explore trends - Compare symptoms with activities, medication, and cycle information - See how symptoms change across days and weeks - Create PDF symptom reports to share with your care team MANAGE MEDICATIONS Keep your medication routine in one place. - Add scheduled and as-needed medications - Set medication reminders and mark doses as taken - Review your medication history and consistency - Share an organized medication list when needed PACE YOUR ENERGY Juno understands spoon theory and the reality of post-exertional crashes. - Set your energy level - Plan tasks around your available spoons - Estimate the energy cost of activities - Build routines that respect your changing capacity CONNECT YOUR HEALTH DATA Bring supported health and wearable data including Apple Health, Oura, Garmin, Bearable, Visible and CareClinic into Juno for a more complete view of your day. Review sleep, steps, heart rate, and activity alongside the symptoms and context you record. FIND PEOPLE WHO GET IT Join a chronic illness community shaped around real lived experience. - Discover posts from people with similar conditions - Join condition-based groups - Share experiences, questions, and photos - Connect through replies, profiles, and private messages BUILT FOR CHRONIC AND INVISIBLE ILLNESS Juno supports people living with fibromyalgia, POTS and dysautonomia, ME/CFS, Long COVID, endometriosis, EDS and hypermobility, MCAS, FND, lupus, arthritis, migraine, IBS, MS, chronic pain, chronic fatigue, autoimmune conditions, neurological conditions, rare disease, and other chronic or invisible illnesses. PRIVATE, SECURE, AND IN YOUR CONTROL Your health data is private and secure. We take privacy seriously and do not sell your personal health information. Juno is a supportive health and wellness assistant, not a doctor or medical service. It does not diagnose, treat, or replace professional medical advice. If you may be experiencing an emergency, contact local emergency services. Join over 200,000 people using Juno to feel more understood, more organized, and less alone. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/](https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://junocompanion.com

Screenshots

TachyMon4 screens
Juno4 screens

Verdict

The call

The clearest difference is rating: Juno at 4.8 against TachyMon's 3.8. Juno also leads on update cadence (weekly vs every 3 months) and ratings volume (10K vs 286). 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 Juno sells 10 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Juno holds the better App Store score, 4.8 against 3.8. That said, the two scores are not equally well evidenced: Juno has 10K ratings behind it against 286, so its average is the more settled of the two. Written reviews point the same way: 57% of TachyMon's written reviews are positive against 71% of Juno's.

UpkeepUpdate frequency

TachyMon ships an update every 3 months, Juno weekly. The most recent releases landed on September 24, 2026 and September 25, 2026 respectively.

Scorecard5 real differences · 6 level
TachyMon versus Juno: the parameters behind the verdict, then further details
ParameterTachyMonJuno
PriceFreeFree
Rating3.8 (286 ratings)4.8 (10K ratings) — better
Positive reviews57.2% of reviews71.0% of reviews — better
Number of ratings28610K — better
Update frequencyEvery 3 monthsWeekly — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
Best chart rank—#125 — better
DevicesiPhone, Apple WatchiPhone, iPad
Requires iOS16.416.4
Further details — not scored
Size36 MB190 MB
Age rating9+17+
DeveloperWhip Development Inc.Marshall Gould

Customer experience

TachyMon

All ratings286 ratings
Positive69.2%
Neutral5.2%
Negative25.5%
Written reviews201 reviews
Positive57.2%
Neutral12.9%
Negative29.9%

Juno

All ratings10,144 ratings
Positive95.8%
Neutral2.8%
Negative1.4%
Written reviews369 reviews
Positive71.0%
Neutral6.0%
Negative23.0%

User reviews

TachyMon

From 286 App Store ratings

What we love

  • 🚀 Continuous monitoring
  • 🚨 Helpful alerts for heart rate spikes/drops
  • 📊 Useful data tracking and visualization
  • 🤖 Customizable settings and thresholds
  • 💯 Accurate heart rate measurements

Room to improve

  • 🔋 Drains Apple Watch battery quickly
  • 🔒 Paywalled features that were previously free
  • 🤯 Buggy and unreliable at times
  • 📱 Lack of companion iPhone app for data review
  • 🔇 Limited notification/alert customization

Juno

From 10K App Store ratings

What we love

  • 👍 Helpful and supportive app
  • 🚀 Great AI feature
  • 💡 Innovative and impressive

Room to improve

  • 🐛 Paid app with limited free access
  • 🐛 Bugs and glitches in the app
  • 😡 Insensitive marketing tactics

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

Juno

Reported bugs

2 issues
  • Inability to save profile details
  • Paid features not working as expected

Requested features

2 requests
  • Improve free access and pricing model
  • Fix bugs and stability issues

In-app purchases

2 purchases

TachyMon

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

Juno

Subscriptions9
  • Juno Pro Weekly$4.997 Days
  • Juno Pro Weekly$6.997 Days
  • Juno Pro Monthly Discounted$9.991 Month
Show 6 more
  • Juno Pro Monthly2 variants$14.991 Month
  • Juno Pro Monthly$19.991 Month
  • Juno Pro Yearly Discounted$39.991 Year
  • Quarterly3 Days trial$44.993 Months
  • Juno Pro Yearly3 Days trial$99.991 Year
  • Juno Pro Yearly7 Days trial$99.991 Year
One-time1
  • Juno Pro - Yearly Special$59.99

Questions

Is TachyMon free?
TachyMon is free to download, with in-app purchases available.
Is Juno free?
Juno is free to download, with in-app purchases available.
Which has better reviews, TachyMon or Juno?
Juno is rated higher. TachyMon averages 3.8 out of 5 from 286 ratings, while Juno averages 4.8 from 10K ratings.
Do TachyMon or Juno have ads?
Neither TachyMon nor Juno shows ads.
Which is updated more often, TachyMon or Juno?
TachyMon ships an update every 3 months, and Juno weekly. Most recently, TachyMon was updated on September 24, 2026 and Juno on September 25, 2026.

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