Comparison

System W vs HeartOxy

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

Head to head
About

System W

Features
Read full description

System W is the app your wellness coach uses to work with you between sessions. Your coach sets up your profile and shares your programme. You get one place to see your measurements, follow your meal plan, build habits, and watch your progress take shape over time. BODY COMPOSITION IN SECONDS Pair a compatible Bluetooth smart scale and capture weight, body fat, muscle, hydration and more in a single reading. Save your profile to the scale itself and it recognises you when you step on, with no phone in your hand. Those weigh-ins sync back the next time you open the app, so nothing is lost when you are in a hurry. PROGRESS YOU CAN READ Every measurement builds a history worth looking at. Compare across weeks and months, spot the trend behind a single bad morning, and review reports your coach can walk you through in your next session. HABITS THAT STICK Build daily habits and challenges around sleep, movement, hydration, journaling, or whatever you are working on right now. Tick them off as you go, keep your streak alive, and share a day or a whole challenge as an image, PDF or QR code when you want someone to see it. YOUR MEAL PLAN Follow the plan your coach built for you, with the detail you need at the moment you are deciding what to eat. WORKING WITH YOUR COACH Your coach creates your profile from the details you give them, keeps your programme current, and sees the same picture you do. No hunting through message threads for the number you were told last month. FOR COACHES AND STUDIOS Look up members, manage your community, run the order calculator and point of sale, and set up new members in a couple of taps. The tools you need on the floor are on the same device as everything else. WORKS WHEN THE SIGNAL DOES NOT Studios have thick walls and basements. System W keeps working offline and catches up when you are back on a connection. IN YOUR LANGUAGE Switch languages in settings and the app follows. System W is a wellness and lifestyle app. It supports healthy habits and general fitness. It is not a medical device, and it does not diagnose, treat, cure or prevent any disease or condition. System W requires an account provided by your coach or studio.

About

HeartOxy

Features
Read full description

Train Smarter with Your Apple Watch No subscriptions. No extra devices. Just your Apple Watch. HeartOxy helps you train in the right heart rate zone β€” with real-time feedback during your workouts, guided by your recent heart rate trends. Train Based on Your Daily Condition β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”- Your body isn’t the same every day. HeartOxy looks at your recent heart rate patterns to give simple, actionable guidance: β€’ See your daily readiness at a glance β€’ Know when to push a little harder β€’ Know when to ease into your workout No complicated metrics β€” just clear direction. Real-Time Heart Rate Zone Feedback β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”- During your workout, HeartOxy keeps you on track: β€’ Live heart rate zone tracking on Apple Watch β€’ Color-coded zone indicators β€’ Instant haptic alerts when you go above or below your target Stay in your zone without constantly checking your screen. Customize Your Training Zones β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€” Set up your preferred heart rate zones and thresholds: β€’ Warm-up, Fat Burn, Aerobic, Anaerobic, Maximum or Custom β€’ Adjustable upper and lower limits β€’ Fine-tune how sensitive alerts should be Your zones, your training style. Review Your Workouts β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€” After each session, understand how you performed: β€’ Time spent in each heart rate zone β€’ Workout history and trends β€’ Export your data for deeper analysis (Up to 90 days of data) β€’ Built-in CSV Export function for easy analysis and sharing. Smart Alerts That Keep You Focused β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€” HeartOxy gives you timely, simple feedback: β€’ Below Zone β†’ β€œPick up the pace” β€’ In Zone β†’ β€œIn your zone” β€’ Above Zone β†’ β€œSlow it down” Clear, immediate guidance β€” no guesswork. No Subscription β€”β€”β€”β€”β€”β€”β€”β€”β€” β€’ One purchase. Full access. Family Sharing encouraged. Built for Apple Watch β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€” β€’ Uses Apple Watch heart rate sensors β€’ Seamless sync between Watch and iPhone Important Notes β€”β€”β€”β€”β€”β€”β€”β€”β€” HeartOxy is designed for fitness and training purposes only. It is not a medical device and does not provide medical advice. Train smarter. Stay in your zone. Make every workout count.

Screenshots

System W4 screens
HeartOxy4 screens

Verdict

The call

The clearest difference is price: System W at Free against HeartOxy's $3.99. HeartOxy's advantage is update cadence (every 3 days vs every 5 weeks). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

System W is free to download; HeartOxy costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

System W ships an update every 5 weeks, HeartOxy every 3 days. The most recent releases landed on October 2, 2026 and September 22, 2026 respectively.

Scorecard2 real differences Β· 4 level
System W versus HeartOxy: the parameters behind the verdict, then further details
ParameterSystem WHeartOxy
PriceFree β€” better$3.99
Update frequencyEvery 5 weeksEvery 3 days β€” better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad, iPod β€” betteriPhone, Apple Watch
Requires iOS15.5 β€” better16.0
Further details β€” not scored
Size77 MB7 MB
Age rating4+4+
DeveloperWXS LimitedBoon Piow Leong

In-app purchases

None

System W

No in-app purchases

None

HeartOxy

No in-app purchases

Questions

Is System W free?
System W is free to download, with no in-app purchases.
Is HeartOxy free?
HeartOxy costs $3.99, with no in-app purchases.
Do System W or HeartOxy have ads?
Neither System W nor HeartOxy shows ads.
Which is updated more often, System W or HeartOxy?
System W ships an update every 5 weeks, and HeartOxy every 3 days. Most recently, System W was updated on October 2, 2026 and HeartOxy on September 22, 2026.

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