# CORE Thermal Sensor vs Azum

The clearest difference is ads: CORE Thermal Sensor at none against Azum's shown. Azum's advantage is update cadence (every 3 weeks vs every 2 months). On price, in-app purchases, device support and iOS requirement 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, Azum every 3 weeks. The most recent releases landed on October 15, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | CORE Thermal Sensor | Azum |
| --- | --- | --- |
| 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** | Yes |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 55 MB | 45 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [greenteg AG](https://appshunter.io/developer/1510577388) | [AZUM system AG](https://appshunter.io/developer/1518572721) |

## 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


### Azum

[App page](https://appshunter.io/ios/app/azum/id6462191503)

**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 Azum free?

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

### Do CORE Thermal Sensor or Azum have ads?

Azum shows ads; CORE Thermal Sensor does not.

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

CORE Thermal Sensor ships an update every 2 months, and Azum every 3 weeks. Most recently, CORE Thermal Sensor was updated on October 15, 2026 and Azum 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.*