# Contrast Hot + Cold Studio vs Ethos Training

The clearest difference is monetization model: Contrast Hot + Cold Studio at free against Ethos Training's free with in-app purchases. Ethos Training's advantage is rating (5.0 vs 4.7). On price, ratings volume, update cadence and ads there is nothing between them.

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

Ethos Training holds the better App Store score, 5.0 against 4.7. Both are backed by a comparable volume of ratings — 17 and 41 respectively.

Contrast Hot + Cold Studio ships an update every 5 weeks, Ethos Training every 4 weeks. The most recent releases landed on June 1, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Contrast Hot + Cold Studio | Ethos Training |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (17 ratings)](https://appshunter.io/ios/app/contrast-hot-plus-cold-studio/id6502682138/reviews) | **[5.0 (41 ratings)](https://appshunter.io/ios/app/ethos-training/id6738397466/reviews)** |
| Number of ratings | 17 | **41** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 4 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 104 MB | 38 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Emerson Waverly, LLC](https://appshunter.io/developer/1746448476) | [Ethos Training Systems LLC](https://appshunter.io/developer/1780636111) |

## What reviewers say

### Contrast Hot + Cold Studio

[App page](https://appshunter.io/ios/app/contrast-hot-plus-cold-studio/id6502682138)

Discover the benefits of hot and cold contrast therapy with this app. Book sessions, manage memberships, and learn about rejuvenation techniques. It integrates with HealthKit to track your activity and encourage a healthier lifestyle.

**Highlights:** Book contrast therapy sessions, Purchase memberships, Learn about contrast therapy, Infrared sauna and cold plunge booking, HealthKit integration for activity tracking

**Features:** macOS Compatibility

**In-app purchases:** none


### Ethos Training

[App page](https://appshunter.io/ios/app/ethos-training/id6738397466)

Browse and purchase class packs or memberships. View the class schedule, filter by type, and easily book your reservations. Manage your upcoming classes to stay organized and committed to your fitness goals.

**Highlights:** Purchase class packs and memberships, View class schedule, Filter classes by type, Manage class reservations, Track upcoming classes

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is Contrast Hot + Cold Studio free?

Contrast Hot + Cold Studio is free to download, with no in-app purchases.

### Is Ethos Training free?

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

### Which has better reviews, Contrast Hot + Cold Studio or Ethos Training?

Ethos Training is rated higher. Contrast Hot + Cold Studio averages 4.7 out of 5 from 17 ratings, while Ethos Training averages 5.0 from 41 ratings.

### Do Contrast Hot + Cold Studio or Ethos Training have ads?

Neither Contrast Hot + Cold Studio nor Ethos Training shows ads.

### Which is updated more often, Contrast Hot + Cold Studio or Ethos Training?

Contrast Hot + Cold Studio ships an update every 5 weeks, and Ethos Training every 4 weeks. Most recently, Contrast Hot + Cold Studio was updated on June 1, 2026 and Ethos Training on September 9, 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.*