# Z vs US Cryo

The clearest difference is ratings volume: Z at 433 against US Cryo's 2. US Cryo's advantage is rating (5.0 vs 4.8) and iOS requirement (13.0 vs 16.0). On price, update cadence, ads and in-app purchases there is nothing between them.

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

US Cryo holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Z has 433 ratings behind it against 2, so its average is the more settled of the two.

Z ships an update every 2 months, US Cryo every 6 weeks. The most recent releases landed on October 15, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | Z | US Cryo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (433 ratings)](https://appshunter.io/ios/app/z-app/id1509263287/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/us-cryo/id6463615076/reviews)** |
| Number of ratings | **433** | 2 |
| Positive reviews | 83.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 6 weeks** |
| Monetization | Free | Free |
| Size | 17 MB | 56 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Allt Hitt ehf](https://appshunter.io/developer/1509263286) | [USCryotherapy](https://appshunter.io/developer/1693541926) |

## What reviewers say

### Z

[App page](https://appshunter.io/ios/app/z-app/id1509263287)

Generate audio frequencies for personal wellness and experimental use. Explore over 1300 sequences for frequency-based practices on your mobile device. This app is for wellness exploration and is not a medical device.

**Highlights:** Rife frequency generator, Over 1300 sequences, Audio frequency generation, Wellness exploration, Mobile and tablet use

**In-app purchases:** none

**What reviewers like**

- 🚀 Amazing support for health
- 👍 Help that is accessible
- 🤯 Astounded me
- 📚 Comprehensive List!
- 💫 Love it!

**What reviewers complain about**

- 🐛 Frozen during session
- 🐛 Frozen
- 🐛 Doesn't stay on
- 🐛 Not working
- 🐛 Stopped playing sound

**Reported bugs**

- Freezing during session
- Stopping playback when interrupted
- Compatibility issues with newer OS
- Lack of TMJ frequency
- Unexpected volume adjustments

**Requested features**

- Sawtooth tone
- Multiple frequencies
- Play controls
- Dark mode
- Back button


### US Cryo

[App page](https://appshunter.io/ios/app/us-cryo/id6463615076)

This app provides access to whole body cryotherapy services for health, recovery, and wellness. It offers a natural and affordable approach to improving your well-being.

**Highlights:** Whole body cryotherapy, Health and recovery services, Wellness solutions, Natural treatments, Affordable care

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Z free?

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

### Is US Cryo free?

US Cryo is free to download, with no in-app purchases.

### Which has better reviews, Z or US Cryo?

US Cryo is rated higher. Z averages 4.8 out of 5 from 433 ratings, while US Cryo averages 5.0 from 2 ratings.

### Do Z or US Cryo have ads?

Neither Z nor US Cryo shows ads.

### Which is updated more often, Z or US Cryo?

Z ships an update every 2 months, and US Cryo every 6 weeks. Most recently, Z was updated on October 15, 2026 and US Cryo on September 25, 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.*