# CORE Thermal Sensor vs Factors

The clearest difference is in-app purchases: CORE Thermal Sensor at none against Factors's 2. Factors's advantage is update cadence (every 11 days vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Factors sells 2 in-app purchases, starting at $9.99 per month. CORE Thermal Sensor asks for nothing beyond the download.

CORE Thermal Sensor ships an update every 2 months, Factors every 11 days. The most recent releases landed on October 23, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | CORE Thermal Sensor | Factors |
| --- | --- | --- |
| 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** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 11 days** |
| Monetization | Free | — |
| Size | 55 MB | 74 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [greenteg AG](https://appshunter.io/developer/1510577388) | [TrainingFactors](https://appshunter.io/developer/1809153747) |

## 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


### Factors

[App page](https://appshunter.io/ios/app/factors-cycling-training-app/id6744746563)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $9.99 | per month |
| Yearly Subscription | $99.99 | per year |


## Frequently asked questions

### Is CORE Thermal Sensor free?

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

### Is Factors free?

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

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

Neither CORE Thermal Sensor nor Factors shows ads.

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

CORE Thermal Sensor ships an update every 2 months, and Factors every 11 days. Most recently, CORE Thermal Sensor was updated on October 23, 2026 and Factors on October 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.*