# CORE Thermal Sensor vs Connected Hydration

The clearest difference is rating: Connected Hydration at 5.0 against CORE Thermal Sensor's 2.5. Connected Hydration also leads on update cadence (monthly vs every 2 months). CORE Thermal Sensor's advantage is ratings volume (35 vs 8) and device support (3 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Connected Hydration holds the better App Store score, 5.0 against 2.5. Both are backed by a comparable volume of ratings — 35 and 8 respectively.

CORE Thermal Sensor ships an update every 2 months, Connected Hydration monthly. The most recent releases landed on October 15, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | CORE Thermal Sensor | Connected Hydration |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.5 (35 ratings)](https://appshunter.io/ios/app/core-thermal-sensor/id1521866309/reviews) | **[5.0 (8 ratings)](https://appshunter.io/ios/app/connected-hydration/id1621442254/reviews)** |
| Number of ratings | **35** | 8 |
| Positive reviews | 18.8% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Monthly** |
| Monetization | Free | Free |
| Size | 55 MB | 41 MB |
| Requires iOS | **15.1** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [greenteg AG](https://appshunter.io/developer/1510577388) | [Epicore Biosystems, Inc](https://appshunter.io/developer/1449621320) |

## 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


### Connected Hydration

[App page](https://appshunter.io/ios/app/connected-hydration/id1621442254)

This app tracks fluid and electrolyte intake by working with a proprietary wearable sensor. It measures real-time sweat and electrolyte loss to provide comprehensive hydration data.

**Highlights:** Real-time sweat/electrolyte loss measurement, Fluid intake tracking, Electrolyte intake tracking, Works with proprietary wearable sensor, Hydration data analysis

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is CORE Thermal Sensor free?

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

### Is Connected Hydration free?

Connected Hydration is free to download, with no in-app purchases.

### Which has better reviews, CORE Thermal Sensor or Connected Hydration?

Connected Hydration is rated higher. CORE Thermal Sensor averages 2.5 out of 5 from 35 ratings, while Connected Hydration averages 5.0 from 8 ratings.

### Do CORE Thermal Sensor or Connected Hydration have ads?

Neither CORE Thermal Sensor nor Connected Hydration shows ads.

### Which is updated more often, CORE Thermal Sensor or Connected Hydration?

CORE Thermal Sensor ships an update every 2 months, and Connected Hydration monthly. Most recently, CORE Thermal Sensor was updated on October 15, 2026 and Connected Hydration on October 2, 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.*