Comparison

Cardio Zones. vs Run+

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

Head to head
About

Cardio Zones.

Train effectively by keeping your heart rate within target zones during various activities. Analyze your performance with cumulative graphs and track your routes. Measure fitness metrics and access preloaded or custom heart rate zones.

Highlights
  • Voice assistant for heart rate zone guidance
  • Cumulative graphs of time in heart rate zones
  • Fitness level and recovery heart rate rating
  • Resting Heart Rate & VO2 Max measurement
  • Preloaded and custom heart rate zones
  • Location tracking of routes with heart rate data
  • Export heart data to CSV for analysis
Features
Read full description

Take your Apple Watch (leave your iPhone at home), bluetooth headphones, go for a run, walk, cycle, spin (Schwinn bikes), gym, swim, row, .... - Use the voice assistant to regulate and keep your heart rate within target zones during workouts - View cumulative graphs for time spent in heart rate zones for workouts, even for any workout recorded by other apps and stored in Apple Health - Rate your fitness level, and recovery heart rate (Superior, Excellent, Good, Fair, Poor) - Measure your Resting Heart Rate & VO2 Max, plus calculate your Max Heart Rate  - Preloaded Heart rate training zones: Karvonen & Zoladz formulas, British Cycling Coaches, Joe Friel Running & Cycle and more. - Create your bespoke heart rate zones. - Find training zones for beginners, intermediates and professionals. - Voice alarm warning guidance helping you stay in your training zones, with Bluetooth headphone support (listen to the funky comments on your progress during your workout) - Real-time heart rate, statistical prediction and training zones are shown in a graph and text format. - Location tracking of your routes with your heart rate data at each point on the map. - Display heart rate data on maps and/or in a graph format. - Export heart data to CSV on iCloud and use Excel and Numbers from your Mac or PC to analyse the raw data and build your own optimised training programme - No login account is required, no external web accounts are needed, and you keep your data (strict privacy). - No subscriptions are required, no extra payments, and full access immediately. - Support portrait and landscape display modes. - Support for Cycling Speed and Cadence Bluetooth service (Apple Watch only) Your heart rate provides insight into how efficiently you’re training and gives you a way to quantify improvements. With zone training, you can yield different benefits and are appropriate at different times during a training plan, whether that is weight loss or improved cardiovascular performance.  Zone training gives you focus. Measuring your heart rate and keeping within your zones can help you from overtraining. Overtraining can lead to exercise addiction which can lead to negative physiological and psychological effects, constant muscle soreness, elevated resting heart rate, burnout, reduced variability, elevated blood pressure, lack of appetite, and even becoming moody. To get the best out of the app you need a heart rate sensor that conforms to the Bluetooth 4 Heart Rate Service (HRS) like the Polar H7 Smart, Wahoo TICKR, Bose Soudsport Pulse, etc. You don’t have a heart sensor: The following functions are available if you don’t have a bluetooth heart sensor or Apple Watch: - Calculate your VO2 Max doing a 1½ mile run. - Calculate your Maximum heart rate. - Get optimal heart zones depending on your fitness goals (fat burn, cardio, et.c). - References and reading material on how heart rate zones are used in fitness & sports sciences. Data Privacy: - Your data remain private in your iOS Device or iCloud Account. You are in control over who views or uses your data. - This app works seamlessly with Apple Health - You do not need any annoying login accounts. - All data is stored on your iPhone/iPad/Apple Watch, and no data is on any external database on the internet or worldwide web. Battery: - Continued use of GPS running in the background can dramatically decrease battery life. - Continued use of the Apple Watch heart rate sensor can dramatically decrease battery life. - Viewing your heart rate in Graph mode will impact your battery life when the App is automatically (the icon with the wheel at the top) adjusting the XY-Axis. Tap on the wheel/settings icon at the top to switch to manual mode to conserve battery life and reduce the graphics power processing requirements. Thank you for your time, and for support or new features request, send me an email from within the App: About | Contact or tweet @ZoneTrainingApp

About

Run+

This intelligent workout coach uses AI to provide real-time, personalized audio feedback during runs. It adapts to your health data, detects critical metrics like climbs and fatigue, and offers motivational insights without needing to check your watch.

Highlights
  • Real-time AI coaching
  • Personalized audio feedback
  • Automatic climb detection
  • Fatigue analysis
  • Integrates with Apple Health
  • On-device processing for privacy
Features
Read full description

Run+ provides a delightful and magical workout experience optimized for Apple Watch with AirPods! Run+ represents a giant leap forward in technology that provides real time personalized coaching using an advanced artificial intelligence system that adapts to daily changes in your health & fitness to help maximize your training & performance. Run+ alerts you to critical data: climbs on your run route, drifting out of the target speed, heart rate, cadence, or effort for your workout, new best times or efforts, when you should hydrate & fuel for optimal performance, and acute or chronic fatigue limits indicating that you should stop to minimize the risk of injury. Additionally, it speaks a summary of your current data when you raise your wrist and provides motivational feedback at critical points throughout your workout. Run+'s intelligent audio feedback allows you to center your focus on the terrain and the effort of your workout, without the distraction of glancing down at your Watch screen to see your data. Because the artificial intelligence algorithms that power Run+ execute directly on your Watch, you get both faster, more immediate coaching during your workout, and your privacy & data security is ensured because your data never leaves your Watch for processing on a distant cloud server. Your Apple Watch stays the heart of every workout—now a companion iPhone app helps you explore, search, and understand your training. Free Features: 1. Audio feedback provided through AirPods so that you don't have to disrupt your workout to look at data on your Watch. 2. Quick audio feedback of current time, speed, heart rate, and cadence data when you raise your wrist. 3. Start & stop run recordings and intervals using force touch menus that perform reliably even under heavy perspiration or rain. 4. Scroll through data screens without swiping by rotating the crown button. 5. Geek out on piles of data and performance metrics. 6. New diary to explore the story of every run. 7. Powerful natural language search instantly surfaces your key data—just ask. 8. Automatic climb detection and categorization. 9. All day battery life for your longest marathon runs. 10. Track indoor treadmill runs. 11. Integrates with Apple Health. Coaching Subscription Features: 1. Intelligent coaching insights analyze your training history to guide you toward improved fitness. 2. Detailed analysis of each mile (or kilometer) split with customized coaching to boost your performance. 3. Comprehensive climb performance analysis and personalized improvement suggestions. 4. Cadence analysis that provides coaching to ensure that you run at a cadence that maximizes speed while minimizing injury. 5. Heart rate analysis with feedback aimed to guide you to your correct target heart rate zone. 6. Speed & effort analysis to help guide you to the optimal effort level to help maximize your training. 7. Real time acute fatigue analysis that alerts you when you are getting tired and should consider stopping to reduce the risk of injury. 8. Post run chronic fatigue analysis that coaches you to take rest days or extra recovery days when appropriate to avoid burnout and overtraining. 9. Alerts to keep you on track with your hydration and fueling during long runs. 10. Frequent audio encouragement to motivate peak performance. 11. Tracking of your all time personal best efforts and performances, with audio notifications when you achieve a new personal best. 12. Flexible interface for designing complex interval workouts with audio feedback and coaching at the start & end of each interval. 13. Customized target training effort ranges based on your personal data. Coaching subscriptions unlock the coaching features across the entire family of World Champ Tech workout apps, and are available for purchase in-app. A free, 14-day trial of the coaching features is available to demo in-app. Run+® registered in U.S. Patent and Trademark Office, registration number 6745036.

Screenshots

Cardio Zones.4 screens
Run+4 screens

Verdict

The call

The clearest difference is price: Run+ at Free against Cardio Zones.'s $49.99. Run+ also leads on rating (4.5 vs 4.3). Cardio Zones.'s advantage is in-app purchases (none vs 4) and ratings volume (40 vs 2). On review sentiment, update cadence and ads 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

Run+ is free to download; Cardio Zones. costs $49.99 up front. Run+ sells 4 in-app purchases, starting at $1.99 per month. Cardio Zones. asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Run+ holds the better App Store score, 4.5 against 4.3. That said, the two scores are not equally well evidenced: Cardio Zones. has 40 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 48% of Cardio Zones.'s written reviews are positive against 50% of Run+'s.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 5 weeks. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

Scorecard7 real differences · 3 level
Cardio Zones. versus Run+: the parameters behind the verdict, then further details
ParameterCardio Zones.Run+
Price$49.99Free — better
Rating4.3 (40 ratings)4.5 (2 ratings) — better
Positive reviews47.6% of reviews50.0% of reviews — better
Number of ratings40 — better2
Update frequencyEvery 5 weeksEvery 5 weeks
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFreemium — better
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, Apple Watch
Requires iOS15.6 — better17.6
Further details — not scored
Size28 MB39 MB
Age rating12+4+
DeveloperTheo ScottWorld Champ Tech

Customer experience

Cardio Zones.

All ratings40 ratings
Positive77.5%
Neutral10.0%
Negative12.5%
Written reviews21 reviews
Positive47.6%
Neutral9.5%
Negative42.9%

Run+

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

In-app purchases

None

Cardio Zones.

No in-app purchases

4 purchases

Run+

Subscriptions3
  • Intelligent Coaching$1.991 Month
  • Intelligent Coaching1 Month trial$1.991 Month
  • Intelligent Coaching$19.991 Year
One-time1
  • Intelligent CoachingFree

Questions

Is Cardio Zones. free?
Cardio Zones. costs $49.99, with no in-app purchases.
Is Run+ free?
Run+ is free to download, with in-app purchases available.
Which has better reviews, Cardio Zones. or Run+?
Run+ is rated higher. Cardio Zones. averages 4.3 out of 5 from 40 ratings, while Run+ averages 4.5 from 2 ratings.
Do Cardio Zones. or Run+ have ads?
Neither Cardio Zones. nor Run+ shows ads.
Which is updated more often, Cardio Zones. or Run+?
Cardio Zones. ships an update every 5 weeks, and Run+ every 5 weeks. Most recently, Cardio Zones. was updated on November 2, 2026 and Run+ on November 3, 2026.

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