# COTRWA vs Z

The clearest difference is ratings volume: Z at 516 against COTRWA's 15. Z also leads on update cadence (every 2 months vs every 4 months). COTRWA's advantage is review sentiment (100% vs 83%). On price, rating, 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.

On the App Store both sit at effectively the same score — 4.8 for COTRWA against 4.8 for Z. That said, the two scores are not equally well evidenced: Z has 516 ratings behind it against 15, so its average is the more settled of the two. Written reviews are what separate them: 100% of COTRWA's written reviews are positive against 83% of Z's.

COTRWA ships an update every 4 months, Z every 2 months. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | COTRWA | Z |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (15 ratings)](https://appshunter.io/ios/app/cotrwa/id1369549168/reviews) | **[4.8 (516 ratings)](https://appshunter.io/ios/app/z-app/id1509263287/reviews)** |
| Number of ratings | 15 | **516** |
| Positive reviews | **100.0% of reviews** | 83.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 43 MB | 17 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | **iPhone, iPad, Apple TV** | iPhone, iPad |
| Age rating | 12+ | 17+ |
| Developer | [Church on the Rock of Washington](https://appshunter.io/developer/1369549167) | [Allt Hitt ehf](https://appshunter.io/developer/1509263286) |

## What reviewers say

### COTRWA

[App page](https://appshunter.io/ios/app/cotrwa/id1369549168)

Stay connected with your church community through live messages, event sign-ups, and a sermon library. Access small groups, make secure donations, and manage your church involvement all from your mobile device.

**Highlights:** Live message streaming, Sermon library access, Event sign-ups, iD Group registration, Secure donation processing, Church calendar

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is COTRWA free?

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

### Is Z free?

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

### Which has better reviews, COTRWA or Z?

Z is rated higher. COTRWA averages 4.8 out of 5 from 15 ratings, while Z averages 4.8 from 516 ratings.

### Do COTRWA or Z have ads?

Neither COTRWA nor Z shows ads.

### Which is updated more often, COTRWA or Z?

COTRWA ships an update every 4 months, and Z every 2 months. Most recently, COTRWA was updated on October 24, 2026 and Z on October 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.*