iCardio Workout Tracker vs Simple Zones
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
iCardio Workout Tracker
This app helps you train smarter by using your heart rate data. It tracks workouts, provides real-time feedback, and integrates with wearables and Apple Health to offer insights into your performance and progress.
- Heart rate zone tracking
- GPS route mapping
- Voice coaching
- Apple Watch & Health integration
- Real-time workout sharing
- Custom fitness assessments
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iCardio – Smarter Heart Rate Training (Supports Bluetooth sensors, Apple Watch & Apple Health, and now AirPods Pro G3!) Track, train, and transform your fitness with iCardio, your all-in-one heart rate training companion. Whether you’re walking, running, cycling, or doing your favorite studio workout, iCardio helps you understand your heart, improve performance, and stay motivated. Train with Precision iCardio turns your heart rate into a powerful training tool. See your heart rate zones live as you work out, get instant feedback, and optimize every session to reach your goals faster — whether you’re training for endurance, weight loss, or general fitness. Connected Fitness, Simplified iCardio integrates seamlessly with Apple Watch and Apple Health, automatically syncing your workouts, calories, and key metrics like: * Heart Rate & Zones * Heart Rate Variability (HRV) * Resting Heart Rate Use iCardio as your fitness hub to bring together data from all your favorite Health-connected apps and devices — making it easier to track your overall wellness in one place. Comprehensive Tracking * GPS route mapping for outdoor workouts * Steps, calories, cadence, and power tracking * Custom Fitness Assessments to personalize zones * Routes & Routines to measure progress over time Key Features * Voice Coaching: Real-time cues to keep you on target * LiveTracking: Share your workout progress in real time * Goal Setting: Define and track personal fitness goals * Advanced Graphs & Analytics: Visualize heart rate, pace, and more * Web Sync: Review your data anytime, anywhere* Sleep, Weight, and Blood Pressure Device Compatibility Works with Apple Watch, Apple Health, and most Bluetooth fitness sensors — including Polar, Wahoo, Scosche, Viiiiva, POWR LABS, CooSpo, OrangeTheory, Garmin, and Moofit. Also supports power meters, cadence sensors, and Peloton® bikes. Free Features * Basic heart rate tracking * GPS & route tracking * Customizable voice coaching * Health metrics (weight, sleep, blood pressure) * Sync with Apple Health STAR Membership Unlock deeper insights with STAR Membership ($4.99/month or $29.99/year): * Advanced heart rate zone analysis * Speed and cadence sensor support * Personalized Fitness Assessments * Routes & Routines tracking * LiveTracking for real-time sharing * Group and community data sharing Subscription Details Payment is charged to your iTunes Account at purchase confirmation. Subscriptions renew automatically unless auto-renew is turned off at least 24 hours before the current period ends. Renewal is billed within 24 hours before renewal at $29.99/year or $4.99/month. Any unused trial period is forfeited upon subscription purchase. Manage or cancel your subscription in your Account Settings at any time. Privacy Policy: fitdigits.com/privacy-policy.html Terms of Use: fitdigits.com/terms-and-conditions.html* Ad-free experience and more Train smarter. Recover better. Live stronger. Download iCardio today and make every heartbeat count.
Simple Zones
Track your workouts in real-time using heart rate zone training. Get instant feedback on your performance to optimize intensity and achieve your fitness goals. Supports Apple Watch and Bluetooth heart rate monitors.
- Real-time heart rate zone visualization
- Apple Watch and Bluetooth HRM support
- Customizable zone models
- Apple Health integration
- Workout data syncing
- Activity ring tracking
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SWEAT SMARTER WITH HEART RATE ZONE TRAINING FOR A BETTER, STRONGER YOU! Visualize how hard you’re working with REAL-TIME ZONE TRAINING using your Apple Watch or connected Bluetooth Heart Rate Monitor No matter your workout activity, you can use Zone Training to get instant feedback on your performance and start crushing your fitness goals. With just a quick glance at the eye-catching zones on your phone or wrist during your workout, you’ll know whether you should pump the brakes on the intensity or crank it up a notch. We use your beats per minute (bpm) and percent of max heart rate to show you which zone you’re in, so you can take the guesswork out of your fitness routine and start maximizing your results today. The Zones App has five branded zone models to choose from, inspired by some of your favorite fitness brands: • Peloton* • NordicTrack* (also supports iFit ActivePulse*!) • Echelon • Orange Zones • Heart Health** * Peloton, NordicTrack, ActivePulse, and Echelon are trademarks owned by those respective companies. ** Inspired by the American Heart Association exercise & fitness guidelines for maintaining a Healthy Heart. BENEFITS OF HEART RATE ZONE TRAINING - Reduced Risk of Fatigue & Overtraining - Better, More Restorative Recovery - Maximum Fat Burn and Weight Loss - Increased Speed and Endurance - Enhanced Performance PRIVACY We value your privacy and never share or sell any user information. APPLE HEALTH INTEGRATION - We read Heart Rate from your Apple Watch via Apple Health - We (optionally) save your workout data to Apple Health - All workouts count towards your Apple activity rings - Sync workouts to Strava, TrainingPeaks, or your favorite workout app through Apple Health importing APPLE WATCH REQUIREMENTS The minimum requirement for the Apple Watch is a series 3 or later. BLUETOOTH HEART RATE MONITOR SUPPORT Connect any standard Bluetooth heart rate monitor, armband, or chest strap. Use your OTBeat, Polar, Wahoo, or Garmin HRM. Terms of Service: https://www.workoutcompanions.app/terms-of-use Privacy Policy: https://www.workoutcompanions.app/privacy-policy
Screenshots
Verdict
The clearest difference is rating: iCardio Workout Tracker at 4.8 against Simple Zones's 4.0. iCardio Workout Tracker also leads on ratings volume (3.4K vs 50) and update cadence (every 11 days vs monthly). Simple Zones's advantage is iOS requirement (15.4 vs 17.6). On price, ads, in-app purchases and monetization model 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
Both are free to download. iCardio Workout Tracker sells 4 in-app purchases, starting at $4.99 per month and Simple Zones sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
iCardio Workout Tracker holds the better App Store score, 4.8 against 4.0. That said, the two scores are not equally well evidenced: iCardio Workout Tracker has 3.4K ratings behind it against 50, so its average is the more settled of the two. Written reviews point the same way: 63% of iCardio Workout Tracker's written reviews are positive against 55% of Simple Zones's.
iCardio Workout Tracker ships an update every 11 days, Simple Zones monthly. The most recent releases landed on October 21, 2026 and October 24, 2026 respectively.
| Parameter | iCardio Workout Tracker | Simple Zones |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (3.4K ratings) — better | 4.0 (50 ratings) |
| Positive reviews | 63.2% of reviews — better | 54.8% of reviews |
| Number of ratings | 3.4K — better | 50 |
| Update frequency | Every 11 days — better | Monthly |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | Free with in-app purchases |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPod, Apple Watch |
| Requires iOS | 17.6 | 15.4 — better |
| Further details — not scored | ||
| Size | 85 MB | 18 MB |
| Age rating | 4+ | 4+ |
| Developer | Fitdigits Inc | Bred Ventures Inc |
Customer experience
iCardio Workout Tracker
Simple Zones
Bugs and requests
iCardio Workout Tracker
Reported bugs
3 issues- Garmin ANT+ connectivity issues
- Incorrect calorie/distance tracking
- Unreliable heart rate monitoring
Requested features
5 requests- Lap/split time tracking
- Multi-user profiles
- Treadmill/elliptical integration
- More customization options
- Improved Apple Watch integration
Simple Zones
Not enough reviews yet to summarise bugs or requests.
In-app purchases
iCardio Workout Tracker
- Star Monthly$4.991 Month
- Pro Plus$24.991 Year
- Star$29.991 Year
- Plus$6.99
Simple Zones
- Zones Pro$4.99
- Zones Pro$9.99
Questions
Is iCardio Workout Tracker free?
Is Simple Zones free?
Which has better reviews, iCardio Workout Tracker or Simple Zones?
Do iCardio Workout Tracker or Simple Zones have ads?
Which is updated more often, iCardio Workout Tracker or Simple Zones?
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