Comparison

VO2 Max Calculator vs CalmingVibration

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

Head to head
About

VO2 Max Calculator

This app calculates your VO2 Max in just 3 minutes using a simple heart rate method. It's based on scientific research and provides general health information, not medical advice.

Highlights
  • Passive VO2 Max reading
  • 3-minute calculation
  • Based on scientific research
  • General health information
  • Video tutorial available
Features
Read full description

Lay down and take a VO2 Max reading. 3 mins. Simple. How is this done? Read this published scientific paper by UTH N., SORENSEN H., OVERGAARD K., PEDERSEN PK. (2004) Estimation of VO2max from the ratio between HRmax and HRrest--the Heart Rate Ratio Method. Eur J Appl Physiol. Jan;91(1):111-5. For help watch this video https://youtu.be/lV5oyoW213A or contact me on https://twitter.com/ZoneTrainingApp/ for help. Note: This is not a medical test, and data use to calculate VO2Max is calibrated against the average population. Medical disclaimer: The medical/health information is provided for general informational and educational purposes only and is not a substitute for professional advice. Accordingly, before taking any actions based upon such information, we encourage you to consult with the appropriate professionals. We do not provide any kind of medical/health advice. THE USE OR RELIANCE OF ANY INFORMATION CONTAINED ON OUR MOBILE APPLICATION IS SOLELY AT YOUR OWN RISK.

About

CalmingVibration

This app uses your Apple Watch's haptic engine to deliver rhythmic vibrations for stress relief and focus. It integrates with HealthKit to monitor stress indicators and offers personalized haptic sessions tailored to your needs.

Highlights
  • Haptic-driven relaxation
  • Smart stress detection using HealthKit
  • Personalized haptic sessions
  • Real-time stress monitoring
  • Customizable session durations and types
  • User-friendly interface
Features
Read full description

CalmingVibration – Soothe Stress with Your Apple Watch Discover a moment of calm with CalmingVibration, the innovative WatchOS app designed to help you manage stress. Harnessing the power of your Apple Watch’s haptic engine, CalmingVibration delivers gentle, rhythmic vibrations to promote relaxation (or focus) and restore balance, right from your wrist. Why CalmingVibration? Personalized Stress Relief: Using HealthKit data like Heart Rate Variability (HRV) and Resting Heart Rate (RHR), CalmingVibration intelligently detects stress levels in real-time and suggests soothing haptic sessions tailored to your needs. Our app uses carefully crafted haptic patterns to calm your nervous system, helping you feel centred. Seamless Integration: Fully compatible with WatchOS 10 and above, CalmingVibration taps into Apple’s HealthKit to monitor your stress indicators and provide actionable insights. Customizable Experience: Adjust session durations, session types (will change the haptic feedback accordingly) and stress detection settings to match your preferences.  Choose intelligent learning-derived baselines or custom thresholds for a truly personalized experience. Real-Time Stress Monitoring: Stay informed with real-time updates on your stress levels, displayed with intuitive emojis and color-coded feedback. Key Features: Haptic-Driven Relaxation: Enjoy customizable vibration patterns to ease stress, from gentle clicks to soothing success haptics. Smart Stress Detection: Leverage HRV and RHR data to identify high or moderate stress levels and receive proactive suggestions for calming or focus sessions. After each session, connect with the Mindfulness app to track your progress and stress levels. User-Friendly Interface: A sleek, intuitive design with a pulsating animation to guide you through sessions, plus easy access to settings for a tailored experience. How It Works: Monitor: CalmingVibration uses HealthKit to track your HRV and RHR, calculating your stress level based on customisable or derived baselines. Relax/Focus: Start a session (1–5 minutes) with specific haptic feedback designed to soothe your nervous system. Reflect: After each session, check your stress levels in the Mindfulness app to see the difference and allow your Apple Watch to re-calculate your HRV and update your RHR [Apologies, Apple (still) doesn't provide an API to trigger that calculation from the App]. Perfect for Everyone Whether you’re navigating a busy workday, preparing for a big moment, or simply seeking a moment of peace, CalmingVibration is your companion for stress relief on the go. Designed for WatchOS 10+, it’s optimized for seamless performance on your Apple Watch. Download CalmingVibration today and feel the difference a moment of calm can make! Notes  CalmingVibration requires access to HealthKit for HRV and RHR data.  Ensure your Apple Watch is running WatchOS 10 or later for the best experience.   Prolonged usage of the haptic feedback may drain the Apple Watch battery. Health claims are not verified by the FDA and are not intended for medical purposes.

Verdict

The call

The clearest difference is chart position: CalmingVibration at #189 against VO2 Max Calculator's unranked. CalmingVibration also leads on iOS requirement (13.0 vs 15.6). VO2 Max Calculator's advantage is ratings volume (14 vs 3). On price, rating, review sentiment and update cadence 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

VO2 Max Calculator costs $1.99 and CalmingVibration $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 2.4 for VO2 Max Calculator against 2.3 for CalmingVibration. Both are backed by a comparable volume of ratings — 14 and 3 respectively. Written reviews are what separate them: 38% of VO2 Max Calculator's written reviews are positive against 33% of CalmingVibration's.

UpkeepUpdate frequency

VO2 Max Calculator ships an update every 7 months, CalmingVibration every 4 months. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

Scorecard3 real differences · 8 level
VO2 Max Calculator versus CalmingVibration: the parameters behind the verdict, then further details
ParameterVO2 Max CalculatorCalmingVibration
Price$1.99$1.99
Rating2.4 (14 ratings) — better2.3 (3 ratings)
Positive reviews38.5% of reviews — better33.3% of reviews
Number of ratings14 — better3
Update frequencyEvery 7 monthsEvery 4 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
Best chart rank—#189 — better
DevicesiPhone, iPod, Apple WatchiPhone, iPod, Apple Watch
Requires iOS15.613.0 — better
Further details — not scored
Size1 MB1 MB
Age rating4+4+
DeveloperTheo ScottRaffaele De Lorenzo

Customer experience

VO2 Max Calculator

All ratings14 ratings
Positive35.7%
Neutral7.1%
Negative57.1%
Written reviews13 reviews
Positive38.5%
Neutral0.0%
Negative61.5%

CalmingVibration

All ratings3 ratings
Positive33.3%
Neutral0.0%
Negative66.7%
Written reviews3 reviews
Positive33.3%
Neutral0.0%
Negative66.7%

In-app purchases

None

VO2 Max Calculator

No in-app purchases

None

CalmingVibration

No in-app purchases

Questions

Is VO2 Max Calculator free?
VO2 Max Calculator costs $1.99, with no in-app purchases.
Is CalmingVibration free?
CalmingVibration costs $1.99, with no in-app purchases.
Which has better reviews, VO2 Max Calculator or CalmingVibration?
VO2 Max Calculator is rated higher. VO2 Max Calculator averages 2.4 out of 5 from 14 ratings, while CalmingVibration averages 2.3 from 3 ratings.
Do VO2 Max Calculator or CalmingVibration have ads?
Neither VO2 Max Calculator nor CalmingVibration shows ads.
Which is updated more often, VO2 Max Calculator or CalmingVibration?
VO2 Max Calculator ships an update every 7 months, and CalmingVibration every 4 months. Most recently, VO2 Max Calculator was updated on November 3, 2026 and CalmingVibration on November 5, 2026.

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