Comparison

TachyMon vs Calorai

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

Calorai

Features
Read full description

CalorAI is your AI-powered nutrition companion that makes calorie tracking simple, accurate, and sustainable. Snap & Track Log meals instantly by taking a photo. Our AI identifies food and estimates calories and macros in seconds. Smart Dashboard Get a clear view of your daily calories, protein, carbs, and fats — all in one beautiful dashboard. Personalized Goals Set your calorie and macro targets based on your height, weight, and goals. CalorAI keeps you on track every day. Apple Health Integration Sync your activity data from Apple Health to get a complete picture of your energy balance. Why CalorAI? - No tedious manual entry — AI does the work - Clean, intuitive interface - Accurate macro breakdowns - Supports weight loss, muscle gain, and maintenance goals Start your free trial today and take control of your nutrition. Subscription Information CalorAI Premium offers monthly and annual auto-renewable subscriptions. Payment will be charged to your Apple ID account upon confirmation of purchase. Subscriptions automatically renew unless cancelled at least 24 hours before the end of the current billing period. You can manage or cancel your subscription anytime in your Apple ID Account Settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.calorai.app/privacy Terms and Conditions: https://www.calorai.app/terms

Screenshots

TachyMon4 screens
Calorai4 screens

Verdict

The call

The clearest difference is update cadence: Calorai at every 5 days against TachyMon's every 3 months. On price, ads, in-app purchases and device support 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 Calorai sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

TachyMon ships an update every 3 months, Calorai every 5 days. The most recent releases landed on November 12, 2026 and October 31, 2026 respectively.

Scorecard1 real difference · 9 level
TachyMon versus Calorai: the parameters behind the verdict, then further details
ParameterTachyMonCalorai
PriceFreeFree
Rating3.8 (287 ratings) — better—
Positive reviews58.0% of reviews—
Number of ratings287 — better—
Update frequencyEvery 3 monthsEvery 5 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, Apple WatchiPhone, iPad, iPod — better
Requires iOS16.415.6 — better
Further details — not scored
Size36 MB58 MB
Age rating9+4+
DeveloperWhip Development Inc.Owais iftikhar

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

Calorai

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
2 purchases

Calorai

Subscriptions2
  • CalorAI Premium Monthly$9.991 Month
  • CalorAI Premium Annual$79.991 Year

Questions

Is TachyMon free?
TachyMon is free to download, with in-app purchases available.
Is Calorai free?
Calorai is free to download, with in-app purchases available.
Do TachyMon or Calorai have ads?
Neither TachyMon nor Calorai shows ads.
Which is updated more often, TachyMon or Calorai?
TachyMon ships an update every 3 months, and Calorai every 5 days. Most recently, TachyMon was updated on November 12, 2026 and Calorai on October 31, 2026.

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