Comparison

TruTrainer SmartLoad vs CORE Thermal Sensor

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

Head to head
About

TruTrainer SmartLoad

Control your bicycle trainer with three distinct modes: manual load, target power, or simulated wind and grade. Customize parameters for your bike and environment, and calibrate the system for accurate resistance. The app also allows for device firmware updates.

Highlights
  • Manual load percentage control
  • Target power (wattage) control
  • Wind and grade simulation
  • Bike and environmental parameter customization
  • Calibration routine
  • Device firmware updates
Features
Read full description

The SmartLoad app provides three modes of operation for your bicycle training needs. Manual mode, allows you to easily select a percentage of maximum load that will be provided at all bike speeds. Target Power mode enables you to choose a constant wattage to be controlled to independent of bike speed or pedal cadence. Wind-Grade mode lets you elect the headwind and road grade and automatically changes resistance based on your bike speed. There are supplemental views that allow you to customize parameters for your bike type and weight and road conditions. This app also provided a calibration routine to allow the system to be tuned to match your bike's parasitic load and changes in roller resistance due to environmental conditions. Lastly it provides capability to update the TruTrainer SmartLoad device firmware via the BLE wireless connection.

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.

Screenshots

TruTrainer SmartLoad4 screens
CORE Thermal Sensor4 screens

Verdict

The call

The clearest difference is rating: TruTrainer SmartLoad at 5.0 against CORE Thermal Sensor's 2.5. TruTrainer SmartLoad also leads on iOS requirement (11.0 vs 15.1). CORE Thermal Sensor's advantage is ratings volume (35 vs 1) and update cadence (every 2 months vs every 9 months). 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

TruTrainer SmartLoad 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 1, so its average is the more settled of the two.

UpkeepUpdate frequency

TruTrainer SmartLoad ships an update every 9 months, CORE Thermal Sensor every 2 months. The most recent releases landed on September 14, 2026 and September 23, 2026 respectively.

Scorecard4 real differences · 6 level
TruTrainer SmartLoad versus CORE Thermal Sensor: the parameters behind the verdict, then further details
ParameterTruTrainer SmartLoadCORE Thermal Sensor
PriceFreeFree
Rating5.0 (1 ratings) — better2.5 (35 ratings)
Positive reviews—15.6% of reviews
Number of ratings135 — better
Update frequencyEvery 9 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.0 — better15.1
Further details — not scored
Size30 MB55 MB
Age rating4+4+
DeveloperRoss Bellonigreenteg AG

Customer experience

TruTrainer SmartLoad

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

CORE Thermal Sensor

All ratings35 ratings
Positive22.9%
Neutral20.0%
Negative57.1%
Written reviews32 reviews
Positive15.6%
Neutral25.0%
Negative59.4%

In-app purchases

None

TruTrainer SmartLoad

No in-app purchases

None

CORE Thermal Sensor

No in-app purchases

Questions

Is TruTrainer SmartLoad free?
TruTrainer SmartLoad is free to download, with no in-app purchases.
Is CORE Thermal Sensor free?
CORE Thermal Sensor is free to download, with no in-app purchases.
Which has better reviews, TruTrainer SmartLoad or CORE Thermal Sensor?
TruTrainer SmartLoad is rated higher. TruTrainer SmartLoad averages 5.0 out of 5 from 1 ratings, while CORE Thermal Sensor averages 2.5 from 35 ratings.
Do TruTrainer SmartLoad or CORE Thermal Sensor have ads?
Neither TruTrainer SmartLoad nor CORE Thermal Sensor shows ads.
Which is updated more often, TruTrainer SmartLoad or CORE Thermal Sensor?
TruTrainer SmartLoad ships an update every 9 months, and CORE Thermal Sensor every 2 months. Most recently, TruTrainer SmartLoad was updated on September 14, 2026 and CORE Thermal Sensor on September 23, 2026.

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