# CORE Thermal Sensor vs Runeasi Runner

The clearest difference is update cadence: Runeasi Runner at monthly against CORE Thermal Sensor's every 2 months. Runeasi Runner also leads on iOS requirement (12.2 vs 15.1). On price, ads, in-app purchases and device support there is nothing between them.

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

CORE Thermal Sensor ships an update every 2 months, Runeasi Runner monthly. The most recent releases landed on October 23, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | CORE Thermal Sensor | Runeasi Runner |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.5 (35 ratings)](https://appshunter.io/ios/app/core-thermal-sensor/id1521866309/reviews)** | — |
| Number of ratings | **35** | — |
| Positive reviews | 18.8% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Monthly** |
| Monetization | Free | — |
| Size | 55 MB | 65 MB |
| Requires iOS | 15.1 | **12.2** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [greenteg AG](https://appshunter.io/developer/1510577388) | [RunEASI NV](https://appshunter.io/developer/1554084857) |

## 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


### Runeasi Runner

[App page](https://appshunter.io/ios/app/runeasi-runner-remote-coach/id6476776612)

**Features:** macOS Compatibility

**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 Runeasi Runner free?

Runeasi Runner is free to download, with no in-app purchases.

### Do CORE Thermal Sensor or Runeasi Runner have ads?

Neither CORE Thermal Sensor nor Runeasi Runner shows ads.

### Which is updated more often, CORE Thermal Sensor or Runeasi Runner?

CORE Thermal Sensor ships an update every 2 months, and Runeasi Runner monthly. Most recently, CORE Thermal Sensor was updated on October 23, 2026 and Runeasi Runner on October 25, 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.*