Comparison

CORE Thermal Sensor vs FluidLogic®

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
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
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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.

About

FluidLogic®

This app provides a personalized, science-backed hydration plan to optimize performance and recovery. It works with a smart hydration pack to track intake, offer haptic reminders, and allow for on-demand water delivery.

Highlights
  • Personalized hydration protocol
  • Customizable dose and interval settings
  • Haptic hydration reminders
  • Remote push-to-drink control
  • Real-time tracking and insights
  • Seamless system integration
Features
Read full description

The FluidLogic app is the key to unlocking the full potential of Active Hydration™, a personalized, science-backed approach to staying hydrated. Designed to work seamlessly with the FluidLogic GPR50 Hydration Pack, the app combines science, technology, and convenience to ensure optimal hydration when it matters most. Download the app today and transform how you hydrate, ride, and recover. ** What The FluidLogic System Can Do for You ** Predictive Hydration, Powered by Science FluidLogic uses proprietary algorithms to estimate your sweat loss based on biometrics, activity intensity, temperature, and humidity. The app provides a personalized hydration plan to keep you optimally hydrated. Smart Hydration Tracking & Insights Monitor your hydration efforts in real-time and review post-ride summaries to improve performance and recovery. Track the amount you drink, hydration performance, and trends over time. Haptic Reminders & Push-to-Drink Control Stay on track with haptic reminders at personalized intervals so you drink at the right time. Use the FluidLogic remote button to trigger precise water doses, eliminating distractions while riding. Effortless Water Delivery & Ergonomic Design The FluidLogic system ensures easy, on-demand hydration. It features a wireless remote button and a magnetic quick-connect system that seamlessly integrates into your ride. No fumbling with hoses—just press the button and drink. ** Key Features ** - Personalized hydration protocol based on proprietary sweat loss factors. - Customizable hydration dose and interval settings. - Haptic hydration reminders to keep you on track. - Remote push-to-drink button for seamless water delivery. - Real-time hydration tracking and post-ride insights. - Full system control and support through the app. ** The FluidLogic System ** FluidLogic is a fully integrated hydration solution combining smart technology and performance-driven gear: 1.) FluidLogic Active Hydration App – Predicts sweat loss, customizes hydration plans, and tracks your progress. 2.) FluidLogic GPR50 Pack – Featuring a battery-powered pump delivering water on demand. 3.) FluidLogic Remote Button – A wireless trigger to dispense precise water doses with the press of a button. 4.) FluidLogic Helmet Kit – A magnetic quick-connect system routing water to your helmet for easy access. ** Why Choose FluidLogic? ** Whether you're a motocross racer, mountain biker, or endurance athlete, FluidLogic eliminates guesswork and optimizes hydration for peak performance. Stay hydrated, ride stronger, and recover faster. ** How it Works ** - Fill Your Pack: Load the FluidLogic GPR50 pack with up to 50 oz of water. - Connect: Turn on your pack and sync it with the app. - Set Your Hydration Plan: Customize your hydration dose and intervals based on predicted sweat loss. - Ride: Follow haptic reminders, press the button to drink, and let FluidLogic optimize your hydration. ** The Science Behind FluidLogic ** Optimal hydration is key to peak performance, but it’s harder to achieve than we think. Many riders believe they know how to hydrate, but the truth is that optimal hydration must be managed. FluidLogic’s proprietary algorithms consider your body, ride intensity, and environmental conditions to deliver the right hydration strategy. By delivering small, precise doses of water at regular intervals, FluidLogic helps your body absorb water efficiently, keeping you hydrated and performing at your best. Dehydration affects both mental and physical performance, but with FluidLogic, you can perform better for longer and recover faster—without the guesswork.

Screenshots

CORE Thermal Sensor4 screens
FluidLogic®4 screens

Verdict

The call

The clearest difference is rating: FluidLogic® at 5.0 against CORE Thermal Sensor's 2.5. FluidLogic® also leads on update cadence (monthly vs every 2 months). CORE Thermal Sensor's advantage is ratings volume (35 vs 5). On price, ads, in-app purchases and monetization model 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

FluidLogic® holds the better App Store score, 5.0 against 2.5. That said, the two scores are not equally well evidenced: CORE Thermal Sensor has 35 ratings behind it against 5, so its average is the more settled of the two.

UpkeepUpdate frequency

CORE Thermal Sensor ships an update every 2 months, FluidLogic® monthly. The most recent releases landed on September 23, 2026 and September 17, 2026 respectively.

Scorecard3 real differences · 7 level
CORE Thermal Sensor versus FluidLogic®: the parameters behind the verdict, then further details
ParameterCORE Thermal SensorFluidLogic®
PriceFreeFree
Rating2.5 (35 ratings)5.0 (5 ratings) — better
Positive reviews15.6% of reviews—
Number of ratings35 — better5
Update frequencyEvery 2 monthsMonthly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.115.1
Further details — not scored
Size55 MB53 MB
Age rating4+4+
Developergreenteg AGFluidlogic, Inc.

Customer experience

CORE Thermal Sensor

All ratings35 ratings
Positive22.9%
Neutral20.0%
Negative57.1%
Written reviews32 reviews
Positive15.6%
Neutral25.0%
Negative59.4%

FluidLogic®

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

CORE Thermal Sensor

No in-app purchases

None

FluidLogic®

No in-app purchases

Questions

Is CORE Thermal Sensor free?
CORE Thermal Sensor is free to download, with no in-app purchases.
Is FluidLogic® free?
FluidLogic® is free to download, with no in-app purchases.
Which has better reviews, CORE Thermal Sensor or FluidLogic®?
FluidLogic® is rated higher. CORE Thermal Sensor averages 2.5 out of 5 from 35 ratings, while FluidLogic® averages 5.0 from 5 ratings.
Do CORE Thermal Sensor or FluidLogic® have ads?
Neither CORE Thermal Sensor nor FluidLogic® shows ads.
Which is updated more often, CORE Thermal Sensor or FluidLogic®?
CORE Thermal Sensor ships an update every 2 months, and FluidLogic® monthly. Most recently, CORE Thermal Sensor was updated on September 23, 2026 and FluidLogic® on September 17, 2026.

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