# Z vs eFlaska

The clearest difference is update cadence: eFlaska at every 5 days against Z's every 2 months. eFlaska also leads on iOS requirement (13.0 vs 16.0). On price, ads, in-app purchases and device support there is nothing between them.

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

Z ships an update every 2 months, eFlaska every 5 days. The most recent releases landed on October 15, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | Z | eFlaska |
| --- | --- | --- |
| 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 | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 days** |
| Monetization | Free | — |
| Size | 17 MB | 115 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Allt Hitt ehf](https://appshunter.io/developer/1509263286) | [Flaska d.o.o.](https://appshunter.io/developer/1592484559) |

## 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


### eFlaska

[App page](https://appshunter.io/ios/app/eflaska/id1627718335)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Z free?

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

### Is eFlaska free?

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

### Do Z or eFlaska have ads?

Neither Z nor eFlaska shows ads.

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

Z ships an update every 2 months, and eFlaska every 5 days. Most recently, Z was updated on October 15, 2026 and eFlaska on September 14, 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.*