Comparison

VO2 Max vs Viscera

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

Head to head
About

VO2 Max

Track your body's oxygen absorption at peak effort with detailed insights and performance estimates for running and cycling. Visualize trends, compare personal bests, and understand your cardio fitness level with a redesigned dashboard and Apple Watch integration.

Highlights
  • VO2 max estimation for running and cycling
  • Performance estimates (W/kg, FTP)
  • Redesigned dashboard with trends and personal bests
  • Interactive charts with customizable date ranges
  • Apple Watch complications and iPhone widgets
  • Cardio fitness level comparison by age and sex
Features
Read full description

VO₂ Max shows how much oxygen your body can absorb at peak effort. The redesigned dashboard puts the latest measurement, rolling averages, and your personal best in one view so you immediately see how training affects cardio fitness. ESTIMATES FOR RUN & BIKE - New tab turns VO₂ max + weight + power into W/kg and FTP estimates for running and cycling. - Compare modeled race times and power against your actual HealthKit FTP/power. NEW DASHBOARD - Trend cards highlight the 7-day average, any selected range, and your best value with percentage deltas. - The interactive chart responds to 1W, 2W, 1M, 3M, 1Y, or All filters and animates every new HealthKit reading. - Entry tiles list the test type, source, and timestamp so you can compare prediction and max-exercise tests. INSIGHTS & GUIDANCE - The info sheet matches your value with the correct age and sex bracket to explain whether it is poor, good, or superior. - Manual refresh, HealthKit warnings, and empty states keep permissions and sync issues obvious. - Trial countdown and subscription access stay a tap away. APPLE WATCH + WIDGETS - All complication families are supported, so your latest VO₂ max is available on every watch face. - iPhone Home Screen and Lock Screen widgets follow the dashboard range you selected. - The Widget Showcase walks you through pinning widgets or complications and previewing layouts. HOW VO₂ MAX IS CAPTURED 1. Wear Apple Watch for at least 24 hours, then record several Outdoor Walk, Outdoor Run, or Hiking workouts with heart rate and GPS. 2. Apple may need several qualifying workouts and passive measurements before the first VO₂ max estimate appears. 3. Give this app read access to Cardio Fitness (VO₂ Max) in Apple Health so the dashboard, widgets, and complications can display the data. Requires Apple Watch Series 3 or later. VO₂ Max makes it easy to see if your cardio fitness plan is working today, over the last weeks, and all time. Terms and conditions: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Viscera

Features
Read full description

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

VO2 Max3 screens
Viscera4 screens

Verdict

The call

The clearest difference is price: VO2 Max at Free against Viscera's $1.99. VO2 Max also leads on update cadence (every 10 days vs monthly). Viscera's advantage is in-app purchases (none vs 3) and chart position (#187 vs unranked). On ads, device support and iOS requirement 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 is free to download; Viscera costs $1.99 up front. VO2 Max sells 3 in-app purchases, starting at $2.99 per month. Viscera asks for nothing beyond the download.

UpkeepUpdate frequency

VO2 Max ships an update every 10 days, Viscera monthly. The most recent releases landed on September 26, 2026 and September 13, 2026 respectively.

Scorecard4 real differences · 7 level
VO2 Max versus Viscera: the parameters behind the verdict, then further details
ParameterVO2 MaxViscera
PriceFree — better$1.99
Rating3.8 (127 ratings) — better—
Positive reviews26.6% of reviews—
Number of ratings127 — better—
Update frequencyEvery 10 days — betterMonthly
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
Best chart rank—#187 — better
DevicesiPhone, iPad, Apple Watch — betteriPhone, iPad
Requires iOS18.0 — better18.5
Further details — not scored
Size10 MB3 MB
Age rating4+17+
DeveloperBernhard HeringHans Christian Christensen

In-app purchases

3 purchases

VO2 Max

Subscriptions2
  • Monthly Subscription$2.991 Month
  • Yearly Subscription$17.991 Year
One-time1
  • Lifetime Access$79.99
None

Viscera

No in-app purchases

Questions

Is VO2 Max free?
VO2 Max is free to download, with in-app purchases available.
Is Viscera free?
Viscera costs $1.99, with no in-app purchases.
Do VO2 Max or Viscera have ads?
Neither VO2 Max nor Viscera shows ads.
Which is updated more often, VO2 Max or Viscera?
VO2 Max ships an update every 10 days, and Viscera monthly. Most recently, VO2 Max was updated on September 26, 2026 and Viscera on September 13, 2026.

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