# CORE Thermal Sensor vs hDrop App

The clearest difference is rating: hDrop App at 3.7 against CORE Thermal Sensor's 2.5. hDrop App also leads on review sentiment (40% vs 16%) and update cadence (fortnightly vs every 2 months). CORE Thermal Sensor's advantage is in-app purchases (none vs 2) and ratings volume (35 vs 11). On price, ads, monetization model and device support there is nothing between them.

Both are free to download. hDrop App sells 2 in-app purchases, starting at $12.99 per month. CORE Thermal Sensor asks for nothing beyond the download.

hDrop App holds the better App Store score, 3.7 against 2.5. Both are backed by a comparable volume of ratings — 35 and 11 respectively. Written reviews point the same way: 16% of CORE Thermal Sensor's written reviews are positive against 40% of hDrop App's.

CORE Thermal Sensor ships an update every 2 months, hDrop App fortnightly. The most recent releases landed on September 23, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | CORE Thermal Sensor | hDrop App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.5 (35 ratings)](https://appshunter.io/ios/app/core-thermal-sensor/id1521866309/reviews) | **[3.7 (11 ratings)](https://appshunter.io/ios/app/hdrop-app/id1525159399/reviews)** |
| Number of ratings | **35** | 11 |
| Positive reviews | 15.6% of reviews | **40.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Monetization | Free | Free |
| Size | 55 MB | 59 MB |
| Requires iOS | **15.1** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [greenteg AG](https://appshunter.io/developer/1510577388) | [hDrop Technologies Inc.](https://appshunter.io/developer/1525159401) |

## What reviewers say

### CORE Thermal Sensor

[App page](https://appshunter.io/ios/app/core-thermal-sensor/id1521866309)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### hDrop App

[App page](https://appshunter.io/ios/app/hdrop-app/id1525159399)

This wearable sensor tracks fluid and sodium loss through sweat during exercise. It provides personalized hydration insights based on your unique physiology, helping endurance athletes optimize their performance. Analyze sweat loss, sodium intake, and rate trends to build a tailored hydration strategy.

**Highlights:** Wearable sweat sensor, Fluid and sodium loss tracking, Personalized hydration strategy, Sweat rate trend analysis, Workout data analysis, Comparison across conditions

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| hDrop Lab | $12.99 | per month |
| hDrop Lab | $89.99 | per year |


## Frequently asked questions

### Is CORE Thermal Sensor free?

CORE Thermal Sensor is free to download, with no in-app purchases.

### Is hDrop App free?

hDrop App is free to download, with in-app purchases available.

### Which has better reviews, CORE Thermal Sensor or hDrop App?

hDrop App is rated higher. CORE Thermal Sensor averages 2.5 out of 5 from 35 ratings, while hDrop App averages 3.7 from 11 ratings.

### Do CORE Thermal Sensor or hDrop App have ads?

Neither CORE Thermal Sensor nor hDrop App shows ads.

### Which is updated more often, CORE Thermal Sensor or hDrop App?

CORE Thermal Sensor ships an update every 2 months, and hDrop App fortnightly. Most recently, CORE Thermal Sensor was updated on September 23, 2026 and hDrop App on September 14, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*