CORE Thermal Sensor vs Aletheia Run
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.
Aletheia Run
Visualize your running form and the forces acting on your body with this app. It provides personalized feedback and exercise recommendations to help you improve performance and reduce injury risk. Track changes in your form over time with detailed metrics and visual analysis.
- Visualize running force portraits
- Analyze biomechanics and form
- Receive personalized exercise recommendations
- Track real-time visual and metric changes
- Log running discomfort
- Compare performance across runs
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Step into the Future of Running: Visualize Your Force with Aletheia Run Experience a revolution in your training with the Aletheia Run sensor and app. This cutting-edge system unveils your unique "Force Portrait," giving you a clear, visual understanding of the forces at play in your body as you run. Guardian of The Run: The Aletheia sensor captures your unique running form with Force Portraits, showing you exactly how your body moves. See how your unique running form creates your personal Force Portrait, highlighting changes in your dynamic form and helping you assess your training effectiveness. Maximize Performance, Minimize Injury: Push your limits without risking injury. Our Force Portraits give you a clear view of your running, beyond standard metrics. Understand your form, identify potential weaknesses, and take control of your running health. Real-Time Visual + Metric Tracking: See and track both visual and metric changes in your form, live. The app makes it easy to spot and quantify mechanical changes that might otherwise go unnoticed. Adjust your training immediately, prevent injuries, and understand your performance limits. Personalized Feedback for Optimal Running: Aletheia Run goes beyond just showing you data. Based on your unique Force Portrait analysis, the app provides personalized exercise recommendations. These tailored exercises are designed to help you improve your running performance and reduce your risk of injury, directly addressing the specific areas identified in your analysis. Key Features of the Aletheia Run App: Biomechanics Understanding: Gain a deep understanding of your running form and the forces your body endures through your personal Force Portraits. Form Visualization: Watch how your form evolves during a single run or over time, adapting to each stage of your training. Enhanced Metrics: Dive into comprehensive metrics like forward, vertical, and lateral symmetries and magnitudes, for a deeper analysis than traditional metrics. Discomfort Log: Track any discomfort during your runs to identify and address potential issues. Performance Comparison: Easily compare your best and worst runs to understand what impacts your form and performance. Feel the Confidence of Data-Driven Running: The Aletheia Run sensor and app are more than just tools; they're your partners in achieving your running goals. By visualizing normally unseen forces, you'll train smarter, go farther, and run faster than ever before. Find Your Force with Aletheia Run! Analyze, optimize, and revolutionize your running form for peak performance.
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Verdict
The clearest difference is review sentiment: Aletheia Run at 100% against CORE Thermal Sensor's 19%. Aletheia Run also leads on rating (4.9 vs 2.5) and update cadence (weekly vs every 2 months). CORE Thermal Sensor's advantage is ads (none vs shown) and monetization model (free vs ad-supported). On price, ratings volume, in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Aletheia Run holds the better App Store score, 4.9 against 2.5. Both are backed by a comparable volume of ratings — 35 and 24 respectively. Written reviews point the same way: 19% of CORE Thermal Sensor's written reviews are positive against 100% of Aletheia Run's.
CORE Thermal Sensor ships an update every 2 months, Aletheia Run weekly. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.
| Parameter | CORE Thermal Sensor | Aletheia Run |
|---|---|---|
| Price | Free | Free |
| Rating | 2.5 (35 ratings) | 4.9 (24 ratings) — better |
| Positive reviews | 18.8% of reviews | 100.0% of reviews — better |
| Number of ratings | 35 — better | 24 |
| Update frequency | Every 2 months | Weekly — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.1 — better | 26.0 |
| Further details — not scored | ||
| Size | 55 MB | 31 MB |
| Age rating | 4+ | 17+ |
| Developer | greenteg AG | Project Dasein |
Customer experience
CORE Thermal Sensor
Aletheia Run
In-app purchases
CORE Thermal Sensor
No in-app purchases
Aletheia Run
No in-app purchases
Questions
Is CORE Thermal Sensor free?
Is Aletheia Run free?
Which has better reviews, CORE Thermal Sensor or Aletheia Run?
Do CORE Thermal Sensor or Aletheia Run have ads?
Which is updated more often, CORE Thermal Sensor or Aletheia Run?
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