CORE Thermal Sensor vs Best Bike Split
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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.
Best Bike Split
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Best Bike Split: Race planning, pacing, workouts, and ride execution on your phone. Build and manage cycling race plans with course maps, target power, expected time, normalized power, intensity factor, and TSS. Use your saved BBS bikes and courses, adjust plans from mobile, and review elevation, power, speed, and pacing charts before race day. When it is time to ride, use the app for outdoor ride mode, indoor race simulation, and structured workouts. Follow target power, interval progress, live ride metrics, route progress, and race-specific pacing guidance from a focused mobile experience. Key features: - Sign in with your existing Best Bike Split account - Create and update race plans from mobile - Review course maps, elevation, power, speed, and pacing data - Ride outside with BBS targets - Simulate race plans indoors - Ride structured workouts indoors or outdoors - Send supported workouts and race-plan workouts to connected training platforms - Upload completed activity files where supported - Use BBS Assistant for race plans, workouts, courses, and support - Sync with the Best Bike Split web app Best Bike Split is built for cyclists and triathletes who want practical race-day pacing, structured training, and a simpler way to turn course data into executable ride plans. Choose Essentials Mobile for full mobile app access with Basic website access, or Premium for full mobile and web access. Both plans are available monthly or yearly. Existing Premium members keep full mobile access with their current subscription. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. You can manage or cancel App Store subscriptions in your Apple account settings. Privacy Policy: https://www.bestbikesplit.com/privacy-policy Terms of Use: https://www.bestbikesplit.com/terms-of-use
Screenshots
Verdict
The clearest difference is in-app purchases: CORE Thermal Sensor at none against Best Bike Split's 2. Best Bike Split's advantage is update cadence (fortnightly vs every 2 months). On price, ads, device support and iOS requirement 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
Both are free to download. Best Bike Split sells 2 in-app purchases, starting at $19.99 per month. CORE Thermal Sensor asks for nothing beyond the download.
CORE Thermal Sensor ships an update every 2 months, Best Bike Split fortnightly. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.
| Parameter | CORE Thermal Sensor | Best Bike Split |
|---|---|---|
| Price | Free | Free |
| Rating | 2.5 (35 ratings) — better | — |
| Positive reviews | 18.8% of reviews | — |
| Number of ratings | 35 — better | — |
| Update frequency | Every 2 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.1 | 15.0 — better |
| Further details — not scored | ||
| Size | 55 MB | 86 MB |
| Age rating | 4+ | 17+ |
| Developer | greenteg AG | Caffeinated Innovations LLC |
In-app purchases
CORE Thermal Sensor
No in-app purchases
Best Bike Split
- Monthly$19.991 Month
- Yearly$119.001 Year
Questions
Is CORE Thermal Sensor free?
Is Best Bike Split free?
Do CORE Thermal Sensor or Best Bike Split have ads?
Which is updated more often, CORE Thermal Sensor or Best Bike Split?
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