# CORE Thermal Sensor vs Runsource

The clearest difference is review sentiment: Runsource at 100% against CORE Thermal Sensor's 16%. Runsource also leads on rating (4.6 vs 2.5) and chart position (#178 vs unranked). CORE Thermal Sensor's advantage is price (Free vs $14.99) and in-app purchases (none vs 7). On update cadence, ads, device support and iOS requirement there is nothing between them.

CORE Thermal Sensor is free to download; Runsource costs $14.99 up front. Runsource sells 6 in-app purchases, starting at $9.99 per month. CORE Thermal Sensor asks for nothing beyond the download.

Runsource holds the better App Store score, 4.6 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 100% of Runsource's.

CORE Thermal Sensor ships an update every 2 months, Runsource every 3 months. The most recent releases landed on September 23, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | CORE Thermal Sensor | Runsource |
| --- | --- | --- |
| Price | **Free** | $14.99 |
| Rating | [2.5 (35 ratings)](https://appshunter.io/ios/app/core-thermal-sensor/id1521866309/reviews) | **[4.6 (11 ratings)](https://appshunter.io/ios/app/runsource-injury-performance/id6627333340/reviews)** |
| Number of ratings | **35** | 11 |
| Positive reviews | 15.6% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | **Free** | Subscription |
| Best chart rank | — | **#178** |
| Size | 55 MB | 44 MB |
| Requires iOS | **15.1** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [greenteg AG](https://appshunter.io/developer/1510577388) | [Fast Bananas](https://appshunter.io/developer/1762249382) |

## 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


### Runsource

[App page](https://appshunter.io/ios/app/runsource-injury-performance/id6627333340)

**Currently charting:** #178 Top Paid · Health & Fitness (US App Store)

This app provides expert-backed guidance for runners experiencing pain or injuries. It uses AI to help you understand your condition and offers evidence-based steps for recovery, allowing you to return to running safely.

**Highlights:** AI-powered injury analysis, Expert-led guidance, Evidence-based recovery steps, Running pain management, Performance improvement

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| RUNsource Basic | $9.99 | per month |
| RUNsource Premium | $14.99 | per month |
| RUNsource Premium | $14.99 | per month |
| RUNsource Premium | $14.99 | per month |
| RUNsource Premium | $14.99 | per month |
| Premium Annual | $134.99 | per year |


## Frequently asked questions

### Is CORE Thermal Sensor free?

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

### Is Runsource free?

Runsource costs $14.99, and also offers in-app purchases.

### Which has better reviews, CORE Thermal Sensor or Runsource?

Runsource is rated higher. CORE Thermal Sensor averages 2.5 out of 5 from 35 ratings, while Runsource averages 4.6 from 11 ratings.

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

Neither CORE Thermal Sensor nor Runsource shows ads.

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

CORE Thermal Sensor ships an update every 2 months, and Runsource every 3 months. Most recently, CORE Thermal Sensor was updated on September 23, 2026 and Runsource on September 12, 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.*