COTRWA vs Z
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
COTRWA
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.
- Live message streaming
- Sermon library access
- Event sign-ups
- iD Group registration
- Secure donation processing
- Church calendar
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Welcome to the official Church on the Rock WA app - This application is meant to help you stay connected with COTR throughout the week. Connect, explore the app and then share it with your friends! Use this app to: - Listen to the message live or access our sermon library - Sign up for events - Stay up to date with church events through the calendar - Sign up for an iD Group (small group) - Make secure donations - And so much more, right from your phone or tablet! At COTR, we believe the Christian life is meant to be an adventurous, abundant life - full of passion and purpose as we pursue genuine and authentic relationships with Jesus and each other! We value discipleship and are excited about the growth and maturity that often happen naturally as we journey together towards Him. For more information about Church on the Rock WA, please visit: https://www.rockwa.com/
Z
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.
- Rife frequency generator
- Over 1300 sequences
- Audio frequency generation
- Wellness exploration
- Mobile and tablet use
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Z-App is a rife frequency generator designed to generate audio frequencies for wellness. With over 1300 sequences, it allows users to explore frequency-based wellness practices right on their phone or tablet. Disclaimer: Z-App is intended for personal wellness and experimental use only. It is not intended to diagnose, treat, cure, or prevent any medical condition. The frequency lists provided are based on anecdotal and alternative wellness traditions and are not supported by medical evidence. Always consult a healthcare professional before using the app, especially if you have any health concerns. This app should not be used as a substitute for professional medical advice or treatment. Use of the app is at your own discretion.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | COTRWA | Z |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (15 ratings) | 4.8 (516 ratings) — better |
| Positive reviews | 100.0% of reviews — better | 83.3% of reviews |
| Number of ratings | 15 | 516 — better |
| Update frequency | Every 4 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, Apple TV — better | iPhone, iPad |
| Requires iOS | 16.0 | 16.0 |
| Further details — not scored | ||
| Size | 43 MB | 17 MB |
| Age rating | 12+ | 17+ |
| Developer | Church on the Rock of Washington | Allt Hitt ehf |
Customer experience
COTRWA
Z
Bugs and requests
COTRWA
Not enough reviews yet to summarise bugs or requests.
Z
Reported bugs
5 issues- Freezing during session
- Stopping playback when interrupted
- Compatibility issues with newer OS
- Lack of TMJ frequency
- Unexpected volume adjustments
Requested features
6 requests- Sawtooth tone
- Multiple frequencies
- Play controls
- Dark mode
- Back button
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- Users manual
In-app purchases
COTRWA
No in-app purchases
Z
No in-app purchases
