VO2 Max Calculator vs Viscera
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Passive VO2 Max reading
- 3-minute calculation
- Based on scientific research
- General health information
- Video tutorial available
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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.
Viscera
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Viscera – Estimate Your Visceral Fat Area (VFA) Viscera is a simple health tool that helps estimate visceral fat area (VFA) using validated formulas for men and women. Visceral fat is the fat stored around internal organs, which may be associated with metabolic health and overall well-being. How it works Input a few basic body measurements. The app calculates your estimated visceral fat area (VFA). Separate formulas are applied for men and women, based on scientific research. Source The calculation formulas are derived from research by the Luxembourg Institute of Health: Amaro J, Santos O, Marques O, et al. Anthropometric surrogate models for visceral fat: a new insight. European Journal of Clinical Nutrition (2021). Read the study Disclaimer Viscera is intended for informational purposes only. It does not provide a medical diagnosis or treatment advice. Results are estimates and should not replace consultation with a qualified healthcare professional. If you have concerns about your health, body composition, or risk factors, always seek advice from your doctor or healthcare provider.
Screenshots
Verdict
The clearest difference is update cadence: Viscera at monthly against VO2 Max Calculator's every 7 months. VO2 Max Calculator's advantage is iOS requirement (15.6 vs 18.5). 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
VO2 Max Calculator costs $1.99 and Viscera $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
VO2 Max Calculator ships an update every 7 months, Viscera monthly. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.
| Parameter | VO2 Max Calculator | Viscera |
|---|---|---|
| Price | $1.99 | $1.99 |
| Rating | 2.4 (14 ratings) — better | — |
| Positive reviews | 38.5% of reviews | — |
| Number of ratings | 14 — better | — |
| Update frequency | Every 7 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPod, Apple Watch — better | iPhone, iPad |
| Requires iOS | 15.6 — better | 18.5 |
| Further details — not scored | ||
| Size | 1 MB | 3 MB |
| Age rating | 4+ | 17+ |
| Developer | Theo Scott | Hans Christian Christensen |
In-app purchases
VO2 Max Calculator
No in-app purchases
Viscera
No in-app purchases
