Comparison

Orange Zones Workout Tracker vs Slab

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

Head to head
About

Orange Zones Workout Tracker

This app uses your heart rate to personalize workouts, optimizing calorie burn and performance. Earn points for effort in high-intensity zones and track your progress in real-time with connected devices.

Highlights
  • Personalized heart rate zones
  • Real-time heart rate monitoring
  • Points system for workout effort
  • Apple Watch and Bluetooth HR monitor support
  • Workout history and summaries
  • Visual heart rate zone mapping
Features
Read full description

Train Smarter with Orange Zones Turn your heart rate into a better workout. Orange Zones gives you real-time heart rate zone tracking on your iPhone and Apple Watch, helping you understand your effort while you train and see exactly how you performed when you're done. Use the Orange Zones model, choose from other popular heart rate zone models, or create your own custom zones. Whether you're in the studio, running, cycling, lifting, rowing, doing HIIT, or simply working toward better fitness, Orange Zones adapts to the way you train. YOUR ZONES. YOUR WORKOUT. Orange Zones automatically calculates personalized heart rate zones based on your maximum heart rate. Prefer another approach? Choose from supported industry-standard zone models or customize your own heart rate zones to match your training goals. Your zones are displayed with clear colors and real-time heart rate data, so you can see your intensity at a glance. EARN POINTS FOR YOUR EFFORT Turn intensity into something you can see. Orange Zones awards points based on time spent in your higher heart rate zones, giving you a simple way to measure effort across workouts and challenge yourself over time. APPLE WATCH + iPHONE Work out your way. Start a workout from your iPhone or Apple Watch and follow your heart rate, zones, workout time, points, and other key stats in real time. Leave your iPhone behind and work out directly from your Apple Watch, or use your iPhone as a larger live workout display. AIRPODS HEART RATE SUPPORT Have supported AirPods with heart rate sensing? Orange Zones can automatically detect them and use their heart rate data during your workout. No setup hassle, put them on and start moving. BLUETOOTH HEART RATE MONITORS Orange Zones also works with standard Bluetooth heart rate monitors, including compatible chest straps and armbands from brands such as Polar, Wahoo, Garmin, and OTBeat. Choose the heart rate source that works best for you. UNDERSTAND EVERY WORKOUT After your workout, see more than just how long you exercised. Review your: * Heart rate and zone performance * Time spent in each heart rate zone * Points earned * Workout intensity * Calories and other available workout stats * Workout history ORANGE ZONES PRO Go beyond individual workouts and see the bigger picture. Orange Zones Pro adds deeper workout insights, including: * Comparative Workout Stats
See how a workout compares with your previous performance. * Trends
Follow changes in your workouts and training over time. * Week in Review
Get an easy-to-understand look at your training week and how it compares with previous weeks. * Email Workout Summaries
Automatically receive a workout summary by email after you finish training. APPLE HEALTH Orange Zones integrates with Apple Health to personalize your experience and save your workouts. When permitted, Orange Zones can read relevant health and fitness information and save completed workouts to Apple Health. Eligible workouts contribute to your Apple Activity rings. BUILT FOR ALL KINDS OF TRAINING Use Orange Zones for running, walking, cycling, HIIT, strength training, rowing, hiking, elliptical workouts, and more. You don't need to train like anyone else. Pick the zone model that works for you, set your goals, and let your heart rate guide your workout. PRIVACY Your health and workout information is personal. We do not sell your personal information. APPLE WATCH REQUIREMENTS Requires a compatible Apple Watch and supported version of watchOS. INDEPENDENT APP Orange Zones is developed by independent app company PK Fitness Apps. Orange Zones is not affiliated with, sponsored by, or endorsed by Orangetheory Fitness, OTF, or Ultimate Fitness Group, LLC. Terms of Service: https://www.workoutcompanions.app/terms-of-use Privacy Policy: https://www.workoutcompanions.app/privacy-policy

About

Slab

This app focuses solely on tracking your daily protein intake, displaying it as a single, prominent number. It simplifies logging with quick-tap options for frequently eaten foods and offers barcode scanning for packaged items. The app emphasizes consistency by tracking streaks of hitting your protein target.

Highlights
  • Protein-only tracking
  • Visualized daily progress blocks
  • One-tap food logging
  • Barcode scanning
  • Custom food saving
  • Streak tracking for consistency
Features
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Slab is a protein tracker that never shows you a calorie. Not buried in settings. Not calculated in the background. One number, all day: grams of protein, and how far you are from your target. Slab requires a subscription to use. Your first month is free, then $29.99 a year or $5.99 a month. THE STACK Everything you log drops in as a block, sized by the protein it added. A dashed line marks your target. You can read your whole day from across the room. ONE TAP The foods you actually eat sit on the home screen, most-logged first. Chicken breast, whey, Greek yogurt, eggs. Tap once and the block drops in. Most days you never leave this screen. FOR EVERYTHING ELSE • Search a catalog built from USDA data and curated by hand, not scraped from restaurant menus • Scan a barcode for anything packaged • Save your own foods once and log them forever • Type any amount, anywhere, and everything is in grams WHAT HISTORY LOOKS LIKE No charts to interpret. Slab answers the only question worth asking: how often do you hit your target. Hit target 24 of the last 30 days. The streak counts days you logged, not days you were perfect, because one bad Sunday shouldn't erase three weeks. WHAT IS NOT IN HERE No calories. No macro wheels. No food photography. No feed. No account to make. No ads. And no premium tier above the subscription you already have — search and barcode are part of the app, not an upsell. Your data stays on your phone and syncs through your own iCloud. It never reaches a server of ours, because we don't have one. Your first month is free. If Slab isn't the fastest way you have ever logged protein, cancel before the month ends and pay nothing. — Slab, yearly: $29.99 per year, with one month free Slab, monthly: $5.99 per month, with one month free Payment is charged to your Apple Account at confirmation of purchase. The subscription renews automatically unless it is turned off at least 24 hours before the end of the current period, and your account is charged for renewal within 24 hours of the end of the current period. You can manage or cancel your subscription in your Apple Account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Orange Zones Workout Tracker4 screens
Slab4 screens

Verdict

The call

The clearest difference is review sentiment: Slab at 100% against Orange Zones Workout Tracker's 60%. Slab also leads on rating (5.0 vs 4.4) and update cadence (every 4 days vs every 9 days). Orange Zones Workout Tracker's advantage is monetization model (free with in-app purchases vs subscription) and ratings volume (1.1K vs 2). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Orange Zones Workout Tracker sells 5 in-app purchases, starting at $9.99 per month and Slab sells 2 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Slab holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Orange Zones Workout Tracker has 1.1K ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 60% of Orange Zones Workout Tracker's written reviews are positive against 100% of Slab's.

UpkeepUpdate frequency

Orange Zones Workout Tracker ships an update every 9 days, Slab every 4 days. The most recent releases landed on October 26, 2026 and October 20, 2026 respectively.

Scorecard5 real differences · 5 level
Orange Zones Workout Tracker versus Slab: the parameters behind the verdict, then further details
ParameterOrange Zones Workout TrackerSlab
PriceFreeFree
Rating4.4 (1.1K ratings)5.0 (2 ratings) — better
Positive reviews60.4% of reviews100.0% of reviews — better
Number of ratings1.1K — better2
Update frequencyEvery 9 daysEvery 4 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases — betterSubscription
DevicesiPhone, Apple Watch — betteriPhone
Requires iOS17.0 — better18.6
Further details — not scored
Size84 MB8 MB
Age rating12+12+
DeveloperBred Ventures IncOne Step Forward Ventures

Customer experience

Orange Zones Workout Tracker

All ratings1,061 ratings
Positive85.0%
Neutral3.4%
Negative11.6%
Written reviews111 reviews
Positive60.4%
Neutral8.1%
Negative31.5%

Slab

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Orange Zones Workout Tracker

Reported bugs

3 issues
  • Frequent app crashes
  • Inconsistent heart rate detection
  • Sync issues between watch and phone

Requested features

5 requests
  • Weekly/monthly workout tracking
  • Customizable display options
  • Ability to pause workouts
  • Integration with Apple Health
  • Social/leaderboard features

Slab

Not enough reviews yet to summarise bugs or requests.

In-app purchases

5 purchases

Orange Zones Workout Tracker

Subscriptions5
  • Pro Monthly$9.991 Month
  • Pro Yearly7 Days trial$19.991 Year
  • Friends & Family Yearly7 Days trial$39.991 Year
Show 2 more
  • Upgrade to annual plan$59.991 Year
  • Pro Yearly7 Days trial$89.991 Year
2 purchases

Slab

Subscriptions2
  • Monthly1 Month trial$5.991 Month
  • Yearly1 Month trial$29.991 Year

Questions

Is Orange Zones Workout Tracker free?
Orange Zones Workout Tracker is free to download, with in-app purchases available.
Is Slab free?
Slab is free to download, with in-app purchases available.
Which has better reviews, Orange Zones Workout Tracker or Slab?
Slab is rated higher. Orange Zones Workout Tracker averages 4.4 out of 5 from 1.1K ratings, while Slab averages 5.0 from 2 ratings.
Do Orange Zones Workout Tracker or Slab have ads?
Neither Orange Zones Workout Tracker nor Slab shows ads.
Which is updated more often, Orange Zones Workout Tracker or Slab?
Orange Zones Workout Tracker ships an update every 9 days, and Slab every 4 days. Most recently, Orange Zones Workout Tracker was updated on October 26, 2026 and Slab on October 20, 2026.

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