Comparison

mainTrack 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

mainTrack

This app helps cyclists meticulously track their bike and component usage. It provides timely service reminders and records all maintenance performed, ensuring your gear is always in top condition. Connect to Strava to automatically update your bike's mileage.

Highlights
  • Track bike and component usage
  • Service reminders
  • Record service history
  • Strava activity synchronization
  • Component assignment to bikes
  • Periodic maintenance planning
  • Cross-device data synchronization
Features
Read full description

MainTrack is a comprehensive Bike Maintenance app that will help to keep track of your bikes and components usage, remind you when it's time to service your gear and record all serviced parts and components. Wondering when was the last time you changed your front tyre? Or what distance you've ridden with your race wheels? Or when you need to service your suspension? MainTrack will help you to answer these questions and much more. Features: • Connect to Strava to synchronize your activities and update your bikes usage • Create Components that you use occasionally or in multiple bikes • Assign Components to Bikes for a period of time and keep track of their usage separately based on the bike's activities • Plan your bikes maintenance periodically based on period of time, usage, rides or elapsed time. • Receive notifications after a ride is completed and when a service is due • Keep track of all services executed • Check your bike's parts usage since you last serviced them • Synchronize your data across multiple devices MainTrack is very intuitive and easy to use, with a beaultiful interface design to provide you the best user experience.

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

mainTrack4 screens
CORE Thermal Sensor4 screens

Verdict

The call

The clearest difference is review sentiment: mainTrack at 89% against CORE Thermal Sensor's 19%. mainTrack also leads on rating (4.6 vs 2.5) and update cadence (fortnightly vs every 2 months). CORE Thermal Sensor's advantage is in-app purchases (none vs 4). On price, ratings volume, ads 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. mainTrack sells 4 one-off in-app purchases. CORE Thermal Sensor asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

mainTrack holds the better App Store score, 4.6 against 2.5. Both are backed by a comparable volume of ratings — 59 and 35 respectively. Written reviews point the same way: 89% of mainTrack's written reviews are positive against 19% of CORE Thermal Sensor's.

UpkeepUpdate frequency

mainTrack ships an update fortnightly, CORE Thermal Sensor every 2 months. The most recent releases landed on October 5, 2026 and October 15, 2026 respectively.

Scorecard5 real differences · 5 level
mainTrack versus CORE Thermal Sensor: the parameters behind the verdict, then further details
ParametermainTrackCORE Thermal Sensor
PriceFreeFree
Rating4.6 (59 ratings) — better2.5 (35 ratings)
Positive reviews88.5% of reviews — better18.8% of reviews
Number of ratings59 — better35
Update frequencyFortnightly — betterEvery 2 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.0 — better15.1
Further details — not scored
Size28 MB55 MB
Age rating4+4+
DeveloperChristiano Gontijogreenteg AG

Customer experience

mainTrack

All ratings59 ratings
Positive89.8%
Neutral3.4%
Negative6.8%
Written reviews61 reviews
Positive88.5%
Neutral3.3%
Negative8.2%

CORE Thermal Sensor

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

In-app purchases

4 purchases

mainTrack

One-time4
  • Coffee$1.99
  • Snack$3.99
  • Lunch$7.99
Show 1 more
  • Dinner$13.99
None

CORE Thermal Sensor

No in-app purchases

Questions

Is mainTrack free?
mainTrack is free to download, with in-app purchases available.
Is CORE Thermal Sensor free?
CORE Thermal Sensor is free to download, with no in-app purchases.
Which has better reviews, mainTrack or CORE Thermal Sensor?
mainTrack is rated higher. mainTrack averages 4.6 out of 5 from 59 ratings, while CORE Thermal Sensor averages 2.5 from 35 ratings.
Do mainTrack or CORE Thermal Sensor have ads?
Neither mainTrack nor CORE Thermal Sensor shows ads.
Which is updated more often, mainTrack or CORE Thermal Sensor?
mainTrack ships an update fortnightly, and CORE Thermal Sensor every 2 months. Most recently, mainTrack was updated on October 5, 2026 and CORE Thermal Sensor on October 15, 2026.

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