# Contrast Hot + Cold Studio vs 100MilesSummer

The clearest difference is update cadence: 100MilesSummer at every 3 days against Contrast Hot + Cold Studio's every 5 weeks. 100MilesSummer also leads on rating (5.0 vs 4.7). Contrast Hot + Cold Studio's advantage is ratings volume (17 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

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

100MilesSummer holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Contrast Hot + Cold Studio has 17 ratings behind it against 1, so its average is the more settled of the two.

Contrast Hot + Cold Studio ships an update every 5 weeks, 100MilesSummer every 3 days. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Contrast Hot + Cold Studio | 100MilesSummer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (17 ratings)](https://appshunter.io/ios/app/contrast-hot-plus-cold-studio/id6502682138/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/100milessummer/id6762247223/reviews)** |
| Number of ratings | **17** | 1 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 3 days** |
| Monetization | Free | Free |
| Size | 104 MB | 102 MB |
| Requires iOS | 15.0 | **14.0.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 12+ |
| Developer | [Emerson Waverly, LLC](https://appshunter.io/developer/1746448476) | [Kayla Jeter](https://appshunter.io/developer/1807669633) |

## 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


### 100MilesSummer

[App page](https://appshunter.io/ios/app/100milessummer/id6762247223)

Join a summer-long community challenge to walk, run, or hike 100 miles. Track your progress and stay motivated with a supportive crew as you embrace the outdoors and build healthy habits.

**Highlights:** Community movement challenge, Track 100 miles over summer, Walk, run, or hike options, Motivated crew support, Build new habits, Reconnect with nature

**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 100MilesSummer free?

100MilesSummer is free to download, with no in-app purchases.

### Which has better reviews, Contrast Hot + Cold Studio or 100MilesSummer?

100MilesSummer is rated higher. Contrast Hot + Cold Studio averages 4.7 out of 5 from 17 ratings, while 100MilesSummer averages 5.0 from 1 ratings.

### Do Contrast Hot + Cold Studio or 100MilesSummer have ads?

Neither Contrast Hot + Cold Studio nor 100MilesSummer shows ads.

### Which is updated more often, Contrast Hot + Cold Studio or 100MilesSummer?

Contrast Hot + Cold Studio ships an update every 5 weeks, and 100MilesSummer every 3 days. Most recently, Contrast Hot + Cold Studio was updated on October 30, 2026 and 100MilesSummer on October 31, 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.*