Comparison

Tacx Training™ vs Just The Watts

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

Head to head
About

Tacx Training™

Transform indoor cycling into immersive outdoor experiences. Connect to a smart trainer to simulate real-world terrain and track performance data. Enjoy virtual rides, challenges, and sync with other devices for comprehensive training.

Highlights
  • Simulate real-world climbs and descents
  • Real-time speed, power, and cadence data
  • Automatic trainer resistance adjustment
  • Syncs with Garmin Connect and Coach
  • Virtual GroupRides and challenges
  • Access to 500+ video routes (Premium)
Read full description

RIDE INDOORS, FEEL OUTDOORS Connect your Tacx™ smart trainer with the Tacx Training app to turn indoor sessions into immersive rides. Tackle steep Alpine and Pyrenean climbs or conquer the cobblestones of Roubaix right from your living room. New routes around the world are added every month. TRAIN WITH REAL DATA, IN REAL TIME When paired with a compatible Tacx smart trainer and other accessories, you can see speed, power, cadence, and heart rate data on screen while your trainer resistance auto-adjusts for realistic climbs and descents. Connect with a Tacx Alpine gradient simulator for an even more immersive climbing and descending experience. INTEGRATE WITH OTHER GARMIN PRODUCTS When you finish a workout in the app, the data automatically uploads to the Garmin Connect™ app to update performance stats, inform training plan workout recommendations, and more. Your Garmin Connect workouts are automatically synced with the Tacx Training app. MOTIVATION THAT LASTS Earn badges by completing challenges, ride with others in real time, or organize virtual GroupRides with your Tacx friends. Download and use the app for free, or upgrade to premium at any time. Free: • Create and perform workouts based on slope, power, or FTP • View and complete your scheduled workouts from Garmin Connect and Garmin Coach • Your rides and workouts automatically sync to Garmin Connect for analysis • View your data across phone, tablet, and desktop Premium: • Gain access to more than 500 high-quality video routes • Download your favorite videos and ride offline • See other live riders and ride with others in real time • Participate in multi-stage challenges • Plan virtual GroupRides with friends Requirements: • Bluetooth 4.0 or later for Tacx Smart trainer connections • Internet is required for video streaming and live features Don’t forget to contact our support team if you have any questions, concerns, or feature requests. Official Garmin app.

About

Just The Watts

This cycling app connects to your Bluetooth sensors for real-time indoor training data. Follow structured workouts or create your own, with virtual power options available. It offers a clean interface focused on your ride, without subscriptions or ads.

Highlights
  • Bluetooth sensor pairing
  • Real-time training data
  • FTP-based intervals
  • Custom workout creation
  • Virtual power option
  • Clean, focused interface
Read full description

Just the Watts is a simple, no-frills cycling app built for indoor training. Pair your Bluetooth power meter, speed sensor, cadence sensor, and heart rate monitor to see real-time data while you ride. You can follow structured workouts based on your FTP or create your own from scratch. No subscriptions, no fluff—just the watts. You’ll get: Real-time data from your Bluetooth sensors FTP-based intervals and fully custom workouts Virtual power if you don’t have a power meter (just pair a speed sensor and select your trainer) A clean, easy-to-use interface that keeps you focused on the ride Built for iPhone and iPad. Trainer only (not for outdoor rides). If you're looking for a straightforward way to track your power indoors, this is it. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Tacx Training™4 screens
Just The Watts3 screens

Verdict

The call

The clearest difference is rating: Tacx Training™ at 4.6 against Just The Watts's 3.0. Tacx Training™ also leads on in-app purchases (none vs 1) and ratings volume (16K vs 2). On price, update cadence, ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Just The Watts sells 1 in-app purchase, starting at $4.99 per month. Tacx Training™ asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Tacx Training™ holds the better App Store score, 4.6 against 3.0. That said, the two scores are not equally well evidenced: Tacx Training™ has 16K ratings behind it against 2, so its average is the more settled of the two.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 26, 2026 and September 29, 2026 respectively.

Scorecard3 real differences · 7 level
Tacx Training™ versus Just The Watts: the parameters behind the verdict, then further details
ParameterTacx Training™Just The Watts
PriceFreeFree
Rating4.6 (16K ratings) — better3.0 (2 ratings)
Positive reviews41.9% of reviews—
Number of ratings16K — better2
Update frequencyEvery 3 weeksEvery 3 weeks
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFreemiumFree with in-app purchases
DevicesiPhone, iPad, Mac — betteriPhone, iPad
Requires iOS16.0 — better16.6
Further details — not scored
Size363 MB14 MB
Age rating4+4+
DeveloperGarminZachary Bell

Customer experience

Tacx Training™

All ratings15,851 ratings
Positive90.4%
Neutral4.8%
Negative4.8%
Written reviews737 reviews
Positive41.9%
Neutral12.3%
Negative45.7%

Just The Watts

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Tacx Training™

Reported bugs

5 issues
  • Inconsistent power and speed readings
  • Inability to resume paused rides
  • Connectivity issues with Bluetooth sensors
  • Calibration problems with trainers
  • Compatibility issues with older devices

Requested features

6 requests
  • Ability to download videos for offline use
  • More detailed performance analytics
  • Integration with other fitness apps (e.g. Apple Health)
  • Better customization options for data screens
  • Audio cues and prompts during workouts
Show 1 more
  • Ability to create and edit custom routes

Just The Watts

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Tacx Training™

No in-app purchases

1 purchases

Just The Watts

Subscriptions1
  • Premium$4.991 Month

Questions

Is Tacx Training™ free?
Tacx Training™ is free to download, with no in-app purchases.
Is Just The Watts free?
Just The Watts is free to download, with in-app purchases available.
Which has better reviews, Tacx Training™ or Just The Watts?
Tacx Training™ is rated higher. Tacx Training™ averages 4.6 out of 5 from 16K ratings, while Just The Watts averages 3.0 from 2 ratings.
Do Tacx Training™ or Just The Watts have ads?
Neither Tacx Training™ nor Just The Watts shows ads.
Which is updated more often, Tacx Training™ or Just The Watts?
Tacx Training™ ships an update every 3 weeks, and Just The Watts every 3 weeks. Most recently, Tacx Training™ was updated on October 26, 2026 and Just The Watts on September 29, 2026.

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