Airofit Legacy vs CORE Thermal Sensor
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Airofit Legacy
This app pairs with a breathing trainer device to help you measure and improve your respiratory strength and lung capacity. It offers customized training programs for various goals like athletic performance, relaxation, and stress reduction, with progress tracking.
- Informative lung tests
- Targeted training programs
- Challenging exercises with visual/audio guidance
- Engaging activity tracking
- Personalized profile and reminders
- Breathing exercises for strength, tolerance, capacity, performance, and relaxation
Read full descriptionHide full description
Breath training has been under-prioritized in sports for too long, though scientific studies continuously prove its multiple benefits. Airofit has developed the first-ever breathing trainer that connects respiratory training with state-of-the-art app technology. Once the app is paired with the Airofit breathing trainer, you will need to take a lung test to measure your respiratory strength. After taking the lung test, you will have the option to choose one of the many programs to train your breathing. The programs will be customized according to your preference and physical condition. As a result, you can practice your breathing and keep track of your progress to see your improvements. The Airofit app is packed with loads of features, including: * INFORMATIVE LUNG TESTS: Measure your vital lung capacity and your maximal respiratory pressures. * TARGETED TRAINING PROGRAMS: Improve your physical performance by training towards specific goals. * CHALLENGING EXERCISES: Follow visual and audio instructions of how to breathe when you train. * ENGAGING ACTIVITY TRACKING: Track your progress and review your records for all the trainings and tests. * EASY PERSONAL CUSTOMIZATION: Set up reminders and personalize your profile to create the most out of your trainings. You can target you breathing training towards one of several goals, including: * RESPIRATORY STRENGTH: Enhance your respiratory power by training the strength of your lung muscles. * ANAEROBIC TOLERANCE: Increase your body's resistance towards lactate by increasing your ability to hold your breath. * VITAL LUNG CAPACITY: Increase your vital lung capacity by improving the flexibility of your lung muscles. * INSTANT PERFORMANCE: Boost your blood circulation and mental focus by breathing properly, just before important performances. * RELAXATION: Strengthen your state of mind and reduce stress levels by following meditative breathing patterns. Airofit is proven to improve your physical performance by up to 8% within just 8 weeks, training only 5-10 minutes twice a day. So, are you ready to join the top performing athletes who breathe better and strive to beat yesterday? Learn more about Airofit at Airofit.com. Terms of sale and service: https://www.airofit.com/pages/terms Jurisdiction Statement: Our app has obtained regulatory clearance for medical hardware in the European Union (EU) and complies with EU medical device regulations. However, we want to emphasize that our commitment to safety and compliance extends beyond the EU borders. Our products are designed to meet the highest international standards and are suitable for use in multiple jurisdictions. Users from all over the world can benefit from our app, knowing that it upholds the rigorous quality and safety standards required for medical hardware. Disclaimer: Airofit is not a medical app but a training app for respiratory muscles. please contact your doctor for any medical/health related issues.
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
Read full descriptionHide 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
Verdict
The clearest difference is review sentiment: Airofit Legacy at 76% against CORE Thermal Sensor's 19%. Airofit Legacy also leads on rating (4.5 vs 2.5) and ratings volume (1.3K vs 35). CORE Thermal Sensor's advantage is in-app purchases (none vs 6). 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. Airofit Legacy sells 6 in-app purchases, starting at $6.99 per month. CORE Thermal Sensor asks for nothing beyond the download.
Airofit Legacy holds the better App Store score, 4.5 against 2.5. That said, the two scores are not equally well evidenced: Airofit Legacy has 1.3K ratings behind it against 35, so its average is the more settled of the two. Written reviews point the same way: 76% of Airofit Legacy's written reviews are positive against 19% of CORE Thermal Sensor's.
Airofit Legacy ships an update every 5 weeks, CORE Thermal Sensor every 2 months. The most recent releases landed on October 25, 2026 and October 23, 2026 respectively.
| Parameter | Airofit Legacy | CORE Thermal Sensor |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (1.3K ratings) — better | 2.5 (35 ratings) |
| Positive reviews | 75.8% of reviews — better | 18.8% of reviews |
| Number of ratings | 1.3K — better | 35 |
| Update frequency | Every 5 weeks — better | Every 2 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 16 | 15.1 — better |
| Further details — not scored | ||
| Size | 182 MB | 55 MB |
| Age rating | 12+ | 4+ |
| Developer | Airofit AS | greenteg AG |
Customer experience
Airofit Legacy
CORE Thermal Sensor
Bugs and requests
Airofit Legacy
Reported bugs
4 issues- App not recognizing device or subscription
- Inaccurate lung capacity measurements
- Exercises not working as intended
- Progress data being lost after app updates
Requested features
5 requests- Offline mode for training sessions
- More customization options for training programs
- Integration with Apple Health or other fitness apps
- Better data export and analysis tools
- Improved customer support and responsiveness
CORE Thermal Sensor
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Airofit Legacy
- Airofit PRO (monthly)1 Month trial$6.991 Month
- Airofit (Monthly)1 Month trial$9.991 Month
- Airofit PRO (yearly)1 Month trial$39.991 Year
Show 3 moreShow fewer
- Airofit Essential14 Days trial$39.991 Year
- Airofit PRO (yearly)1 Month trial$59.001 Year
- Airofit (Yearly)1 Month trial$84.001 Year
CORE Thermal Sensor
No in-app purchases
Questions
Is Airofit Legacy free?
Is CORE Thermal Sensor free?
Which has better reviews, Airofit Legacy or CORE Thermal Sensor?
Do Airofit Legacy or CORE Thermal Sensor have ads?
Which is updated more often, Airofit Legacy or CORE Thermal Sensor?
Other comparisons















