Comparison

Body Temperature Note 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

Body Temperature Note

Easily track daily body temperatures for multiple individuals or for personal use. This straightforward app focuses on simple temperature logging and notes, with features like smart input and historical charts to monitor changes over time.

Highlights
  • Log temperatures for multiple people
  • Smart number input for quick entry
  • Supports Celsius and Fahrenheit
  • Temperature charts and history view
  • Calendar view for daily records
  • Sync with Apple Health
  • Export data as CSV
Features
Read full description

Quick and simple temperature tracking for your family. Body Temperature Note is a simple app for recording daily body temperatures for families or small groups. You can enter temperatures for multiple people at once, making it easy to keep daily records even on busy mornings or evenings. Of course, it can also be used as a single-person temperature log. The app is designed to stay simple. It focuses only on body temperature and short notes, so you can keep recording every day without stress or confusion. Features : * Log temperatures for multiple people at once * Smart number input (e.g. enter “364” to record 36.4°C) * Supports °C and °F * Temperature charts to see changes over time * Main screen: last 7 records * Detail screen: full history * View the latest temperature and average temperature on the main screen * Unusual values can be excluded from the average * Calendar view for daily records * No limit on the number of users (Designed for about 2–10 people) * Sync one person’s data with Apple Health * iCloud backup * Export all data as CSV Ads are displayed on the main screen and calendar screen.

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

Body Temperature Note4 screens
CORE Thermal Sensor4 screens

Verdict

The call

The clearest difference is review sentiment: Body Temperature Note at 86% against CORE Thermal Sensor's 16%. Body Temperature Note also leads on rating (4.7 vs 2.5). CORE Thermal Sensor's advantage is ads (none vs shown) and update cadence (every 2 months vs every 12 months). On price, 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

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

Body Temperature Note holds the better App Store score, 4.7 against 2.5. That said, the two scores are not equally well evidenced: CORE Thermal Sensor has 35 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 86% of Body Temperature Note's written reviews are positive against 16% of CORE Thermal Sensor's.

UpkeepUpdate frequency

Body Temperature Note ships an update every 12 months, CORE Thermal Sensor every 2 months. The most recent releases landed on August 23, 2026 and September 23, 2026 respectively.

Scorecard7 real differences · 3 level
Body Temperature Note versus CORE Thermal Sensor: the parameters behind the verdict, then further details
ParameterBody Temperature NoteCORE Thermal Sensor
PriceFreeFree
Rating4.7 (3 ratings) — better2.5 (35 ratings)
Positive reviews85.7% of reviews — better15.6% of reviews
Number of ratings335 — better
Update frequencyEvery 12 monthsEvery 2 months — better
AdsYesNo — better
In-app purchasesNoNo
MonetizationAd-supportedFree — better
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.615.1 — better
Further details — not scored
Size20 MB55 MB
Age rating4+4+
Developersabitori worksgreenteg AG

Customer experience

Body Temperature Note

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews7 reviews
Positive85.7%
Neutral14.3%
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

Body Temperature Note

No in-app purchases

None

CORE Thermal Sensor

No in-app purchases

Questions

Is Body Temperature Note free?
Body Temperature Note 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, Body Temperature Note or CORE Thermal Sensor?
Body Temperature Note is rated higher. Body Temperature Note averages 4.7 out of 5 from 3 ratings, while CORE Thermal Sensor averages 2.5 from 35 ratings.
Do Body Temperature Note or CORE Thermal Sensor have ads?
Body Temperature Note shows ads; CORE Thermal Sensor does not.
Which is updated more often, Body Temperature Note or CORE Thermal Sensor?
Body Temperature Note ships an update every 12 months, and CORE Thermal Sensor every 2 months. Most recently, Body Temperature Note was updated on August 23, 2026 and CORE Thermal Sensor on September 23, 2026.

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