Comparison

TachyMon vs Embody Space

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

Embody Space

A privacy-focused app that helps you understand and track your menstrual cycle. It offers effortless logging of symptoms and moods, providing comprehensive insights and educational resources to deepen your body literacy.

Highlights
  • Private by default (local-only data)
  • Effortless logging of symptoms and moods
  • Comprehensive cycle insights
  • Educational resources on menstrual health
  • Ovulation tracking
  • Body literacy building
Read full description

Embody isn't your typical period tracker—it's a privacy-forward app that accompanies you throughout every phase of your cycle. We understand that your personal data deserves the utmost protection, which is why we've created Embody with a strong commitment to safeguarding your privacy at all times. Embody is designed to empower and support you on your menstrual journey, helping you build your body literacy and deepen your understanding of your unique cycle. Here's what makes Embody a game-changer: * Private by default: At Embody, we take your privacy seriously. Our app is local-only, meaning your data never leaves your phone without your explicit permission. We can’t share your personal health information, because we don’t have it. The information on your device is encrypted for extra security. * Effortless logging: Embody boasts a user-friendly interface that simplifies cycle tracking. Log symptoms during all phases of your cycle, moods, cycle disruptors, and more with ease. Stay on top of your well-being by effortlessly maintaining a comprehensive record of your entire cycle. * Comprehensive cycle insights: Embody goes beyond tracking periods and PMS symptoms. We provide a holistic approach to cycle tracking, offering valuable insights into all phases of your cycle. Explore patterns, track ovulation and understand how your moods, emotions, and body change throughout the month. Embody is your guide to building body literacy. * Empowering knowledge and resources: Embody equips you with educational resources to deepen your understanding of each cycle phase. Explore informative articles, expert tips, and supportive content that addresses various aspects of menstrual health. Embody empowers you with knowledge to make informed decisions about your body. Embody is more than just a period tracker—it's your comprehensive cycle companion that nurtures your overall well-being, helps you build your body literacy, and respects your privacy. Download Embody now to embark on a journey towards understanding and embracing your entire cycle. Privacy. Empowerment. Embody. Best regards, The Embody Team Disclaimer: The content provided by Embody is for information and education purposes only. It's not intended to replace medical advice from healthcare professionals. Please seek your doctor’s advice in addition to using this app and before making any medical decisions

Screenshots

TachyMon4 screens
Embody Space4 screens

Verdict

The call

The clearest difference is rating: Embody Space at 4.4 against TachyMon's 3.8. Embody Space also leads on update cadence (every 3 weeks vs every 3 months) and review sentiment (73% vs 58%). On price, ratings volume, ads and in-app purchases 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 Embody Space sells 4 in-app purchases, starting at $4.95 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Embody Space holds the better App Store score, 4.4 against 3.8. Both are backed by a comparable volume of ratings — 288 and 176 respectively. Written reviews point the same way: 58% of TachyMon's written reviews are positive against 73% of Embody Space's.

UpkeepUpdate frequency

TachyMon ships an update every 3 months, Embody Space every 3 weeks. Both last shipped on November 3, 2026.

Scorecard4 real differences · 6 level
TachyMon versus Embody Space: the parameters behind the verdict, then further details
ParameterTachyMonEmbody Space
PriceFreeFree
Rating3.8 (288 ratings)4.4 (176 ratings) — better
Positive reviews58.0% of reviews72.6% of reviews — better
Number of ratings288 — better176
Update frequencyEvery 3 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, Apple WatchiPhone, iPod
Requires iOS16.413.4 — better
Further details — not scored
Size36 MB48 MB
Age rating9+17+
DeveloperWhip Development Inc.Embody Space, Inc.

Customer experience

TachyMon

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

Embody Space

All ratings149 ratings
Positive86.6%
Neutral2.7%
Negative10.7%
Written reviews95 reviews
Positive72.6%
Neutral10.5%
Negative16.8%

User reviews

TachyMon

From 288 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

Embody Space

From 176 App Store ratings

What we love

  • 💎 Informative and educational
  • 🔒 Privacy-focused
  • 🎨 Aesthetically pleasing design
  • 💰 Completely free to use
  • 🤗 Helpful and supportive for women's health

Room to improve

  • 🕰️ Inaccurate period predictions
  • 🤔 Confusing or difficult to navigate
  • 🔍 Limited data history input
  • 🗓️ Inability to log end of cycle

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

Embody Space

Reported bugs

2 issues
  • Data corruption or loss
  • App crashes or freezes

Requested features

5 requests
  • Dark mode option
  • Partner/shared tracking feature
  • Basal body temperature (BBT) tracking
  • Longer data history input
  • Ability to log end of cycle

In-app purchases

2 purchases

TachyMon

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

Embody Space

Subscriptions4
  • Monthly Essential$4.951 Month
  • Monthly$11.951 Month
  • Monthly Supporter$15.951 Month
Show 1 more
  • Annual Subscription$79.991 Year

Questions

Is TachyMon free?
TachyMon is free to download, with in-app purchases available.
Is Embody Space free?
Embody Space is free to download, with in-app purchases available.
Which has better reviews, TachyMon or Embody Space?
Embody Space is rated higher. TachyMon averages 3.8 out of 5 from 288 ratings, while Embody Space averages 4.4 from 176 ratings.
Do TachyMon or Embody Space have ads?
Neither TachyMon nor Embody Space shows ads.
Which is updated more often, TachyMon or Embody Space?
TachyMon ships an update every 3 months, and Embody Space every 3 weeks. Most recently, TachyMon was updated on November 3, 2026 and Embody Space on November 3, 2026.

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