Comparison

CORE Thermal Sensor vs Team EF Coaching

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

Head to head
About

CORE Thermal Sensor

This app continuously monitors your core body temperature and thermal strain, providing critical data for heat training and optimal race performance. It helps athletes of all levels improve their training and achieve better results.

Highlights
  • Continuous core body temperature monitoring
  • Real-time Heat Strain Index
  • Heat Zones for training and racing
  • Heat Training Load and Adaptation Score
  • Passive heat training tracking
  • Data trends and historical analysis
  • Connectivity with sports devices
Features
Read full description

The CORE Thermal Sensor accurately measures your core body temperature and thermal strain on your body – continuously and non-invasively. Thermal data and insights are critical for facilitating safe and effective heat training and for performing optimally on race day. Designed for athletes at all levels, CORE will help to improve your training and performance in your personal adventures or races. IMPORTANT: The CORE app is designed to work with the CORE device which you can order at www.corebodytemp.com Here's how it works: • Set up your CORE sensor: connect your heart rate monitor and sports devices for optimal sensor use. • Measure your thermal vitals during training: mount the newly designed clip on your heart rate strap and snap in the CORE sensor. Shake the sensor to wake it up, wear it and track your thermal data. • Core body temperature: the interior temperature deep in your body, including organs and other tissues. A critical measure during sports, it can reach up to 40°C (104°F) during vigorous activity in hot environments. Be aware that hotter is not better – cooler is faster. • Heat Strain Index: A combination of your core body temperature and skin temperature representing the thermal strain on your body. The real-time feedback on how hard your body is working to stay cool, delivering a value from 0 (no heat strain) to around 10 (extremely high heat strain). • Heat Zones: Your Heat Strain Index divided into easy-to-use zones. Heat Zone 3 will likely lead to a performance loss, BUT it is the needed stimuli to create adaptations in your body. During heat training, strive for time in heat zone 3. During racing, stay cool and prevent a performance loss by staying in heat zone 1 or 2. • Heat Training Load: a cumulative daily metric of the heat strain on your body. A daily value of 10 out of 10 indicates ideal contribution to heat adaptations. More is not always better! • Heat Adaptation Score: Track your heat adaptations over time with effective heat training. Get a heat champion to perform best in the heat. Long-term heat training will most likely lead to improvements also in cool conditions. • Add your passive heat training: Supplementing your active heat training or general training with passive heat exposure in a sauna or hot bath. You can track your sessions in the app manually, contributing to your heat adaptation score. NOTE: do NOT take your CORE sensor into the sauna or hot environments. What else you can do in the CORE app: • Dig into the details: See a breakdown of your thermal data, and even see trends across days, weeks and months. • Share your CORE metrics with your friends through the social sharing feature, earning more kudos and likes • Connect your connectivity accounts (e.g. Garmin) to directly synchronize your data after the training. • Update your sensor to the latest firmware ensuring having the best sensor functionality. Note: CORE provides products and services designed for general fitness and training purposes. For accurate measurement readings during sports, a connection to a heart rate monitor is necessary. CORE products and services are not medical devices, not intended to treat or diagnose any disease, and should not be used as a substitute for professional medical advice, diagnosis or treatment. All content available through CORE products and services is for general informational purposes only.

About

Team EF Coaching

Access expert cycling training knowledge from a professional team. Explore a vast library of educational videos covering training, technique, and nutrition. Save your favorite content for easy access and stay updated with the latest news.

Highlights
  • Extensive video library
  • Training and technique lessons
  • Nutrition guidance
  • Content Hub
  • Favorite content saving
  • Push notifications
Features
Read full description

Access the knowledge of a WorldTour cycling team. View a massive library of educational videos that teach numerous aspects of training and cycling, from how to position your body when sprinting, to understanding the basics of lactic acid, to why your recovery rides aren’t nearly easy enough. Our library takes what we’ve learned over two decades in professional sport and boils it down into digestible content you can learn from. Inside the Team EF Coaching app, you can: - Check out the Content Hub full of video lessons on training, technique, nutrition and much more... - Receive push notifications with the latest news and updates - Save your favorite content so you can quickly find it later END USER LICENSE AGREEMENT https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

CORE Thermal Sensor4 screens
Team EF Coaching4 screens

Verdict

The call

The clearest difference is rating: Team EF Coaching at 5.0 against CORE Thermal Sensor's 2.5. Team EF Coaching also leads on update cadence (every 3 weeks vs every 2 months). CORE Thermal Sensor's advantage is ratings volume (35 vs 3). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Team EF Coaching holds the better App Store score, 5.0 against 2.5. That said, the two scores are not equally well evidenced: CORE Thermal Sensor has 35 ratings behind it against 3, so its average is the more settled of the two.

UpkeepUpdate frequency

CORE Thermal Sensor ships an update every 2 months, Team EF Coaching every 3 weeks. The most recent releases landed on October 15, 2026 and October 4, 2026 respectively.

Scorecard3 real differences · 7 level
CORE Thermal Sensor versus Team EF Coaching: the parameters behind the verdict, then further details
ParameterCORE Thermal SensorTeam EF Coaching
PriceFreeFree
Rating2.5 (35 ratings)5.0 (3 ratings) — better
Positive reviews18.8% of reviews—
Number of ratings35 — better3
Update frequencyEvery 2 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.1 — better16.6
Further details — not scored
Size55 MB50 MB
Age rating4+4+
Developergreenteg AGTeam EF Coaching

Customer experience

CORE Thermal Sensor

All ratings35 ratings
Positive22.9%
Neutral20.0%
Negative57.1%
Written reviews48 reviews
Positive18.8%
Neutral25.0%
Negative56.3%

Team EF Coaching

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

CORE Thermal Sensor

No in-app purchases

None

Team EF Coaching

No in-app purchases

Questions

Is CORE Thermal Sensor free?
CORE Thermal Sensor is free to download, with no in-app purchases.
Is Team EF Coaching free?
Team EF Coaching is free to download, with no in-app purchases.
Which has better reviews, CORE Thermal Sensor or Team EF Coaching?
Team EF Coaching is rated higher. CORE Thermal Sensor averages 2.5 out of 5 from 35 ratings, while Team EF Coaching averages 5.0 from 3 ratings.
Do CORE Thermal Sensor or Team EF Coaching have ads?
Neither CORE Thermal Sensor nor Team EF Coaching shows ads.
Which is updated more often, CORE Thermal Sensor or Team EF Coaching?
CORE Thermal Sensor ships an update every 2 months, and Team EF Coaching every 3 weeks. Most recently, CORE Thermal Sensor was updated on October 15, 2026 and Team EF Coaching on October 4, 2026.

Other comparisons