# Z vs PoolKeep

The clearest difference is in-app purchases: Z at none against PoolKeep's 4. PoolKeep's advantage is update cadence (weekly vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. PoolKeep sells 4 in-app purchases, starting at $4.99 per month. Z asks for nothing beyond the download.

Z ships an update every 2 months, PoolKeep weekly. The most recent releases landed on October 15, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | Z | PoolKeep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (433 ratings)](https://appshunter.io/ios/app/z-app/id1509263287/reviews)** | — |
| Number of ratings | **433** | — |
| Positive reviews | 83.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | Free | — |
| Size | 17 MB | 9 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Allt Hitt ehf](https://appshunter.io/developer/1509263286) | [Kelly Reed](https://appshunter.io/developer/6788501210) |

## 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


### PoolKeep

[App page](https://appshunter.io/ios/app/poolkeep-pool-care-101/id6788501208)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Founding Member | $4.99 | per month |
| Monthly | $9.99 | per month |
| Annual | $99.99 | per year |
| Founding Member Fee | $59.99 | one-time |


## Frequently asked questions

### Is Z free?

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

### Is PoolKeep free?

PoolKeep is free to download, with in-app purchases available.

### Do Z or PoolKeep have ads?

Neither Z nor PoolKeep shows ads.

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

Z ships an update every 2 months, and PoolKeep weekly. Most recently, Z was updated on October 15, 2026 and PoolKeep 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.*