# CORE Thermal Sensor vs Wrist Temperature Tracker

The clearest difference is rating: Wrist Temperature Tracker at 3.4 against CORE Thermal Sensor's 2.5. Wrist Temperature Tracker also leads on update cadence (every 11 days vs every 2 months) and review sentiment (28% vs 16%). CORE Thermal Sensor's advantage is in-app purchases (none vs 3) and iOS requirement (15.1 vs 18.0). On price, ads and device support there is nothing between them.

Both are free to download. Wrist Temperature Tracker sells 3 in-app purchases, starting at $1.99 per month. CORE Thermal Sensor asks for nothing beyond the download.

Wrist Temperature Tracker holds the better App Store score, 3.4 against 2.5. Both are backed by a comparable volume of ratings — 35 and 127 respectively. Written reviews point the same way: 16% of CORE Thermal Sensor's written reviews are positive against 28% of Wrist Temperature Tracker's.

CORE Thermal Sensor ships an update every 2 months, Wrist Temperature Tracker every 11 days. The most recent releases landed on September 23, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | CORE Thermal Sensor | Wrist Temperature Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.5 (35 ratings)](https://appshunter.io/ios/app/core-thermal-sensor/id1521866309/reviews) | **[3.4 (127 ratings)](https://appshunter.io/ios/app/wrist-temperature-tracker/id6443753237/reviews)** |
| Number of ratings | 35 | **127** |
| Positive reviews | 15.6% of reviews | **27.9% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 11 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 55 MB | 5 MB |
| Requires iOS | **15.1** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [greenteg AG](https://appshunter.io/developer/1510577388) | [Bernhard Hering](https://appshunter.io/developer/327542085) |

## 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


### Wrist Temperature Tracker

[App page](https://appshunter.io/ios/app/wrist-temperature-tracker/id6443753237)

Automatically analyzes your cycle, ovulation, and temperature patterns using Apple Watch data. Visualize your cycle phases with intelligent charting and trend insights. Advanced features like cycle overlays and widgets require an in-app purchase.

**Highlights:** Automatic cycle detection, Ovulation and temperature pattern analysis, Cycle comparison and overlays, Trend insights and phase visualization, Daily temperature heat-map, Yearly trend overview

**Features:** macOS Compatibility, Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $1.99 | per month |
| Yearly Subscription | $11.99 | per year |
| Unlock Wrist Temperature | $79.99 | one-time |


## Frequently asked questions

### Is CORE Thermal Sensor free?

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

### Is Wrist Temperature Tracker free?

Wrist Temperature Tracker is free to download, with in-app purchases available.

### Which has better reviews, CORE Thermal Sensor or Wrist Temperature Tracker?

Wrist Temperature Tracker is rated higher. CORE Thermal Sensor averages 2.5 out of 5 from 35 ratings, while Wrist Temperature Tracker averages 3.4 from 127 ratings.

### Do CORE Thermal Sensor or Wrist Temperature Tracker have ads?

Neither CORE Thermal Sensor nor Wrist Temperature Tracker shows ads.

### Which is updated more often, CORE Thermal Sensor or Wrist Temperature Tracker?

CORE Thermal Sensor ships an update every 2 months, and Wrist Temperature Tracker every 11 days. Most recently, CORE Thermal Sensor was updated on September 23, 2026 and Wrist Temperature Tracker on September 28, 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.*