# Isochronic vs Mannavibes Xtal

The clearest difference is price: Mannavibes Xtal at Free against Isochronic's $5.99. Mannavibes Xtal also leads on review sentiment (100% vs 92%) and iOS requirement (9.0 vs 12.0). Isochronic's advantage is update cadence (every 6 weeks vs every 9 months) and ratings volume (66 vs 5). On rating, ads, in-app purchases and monetization model there is nothing between them.

Mannavibes Xtal is free to download; Isochronic costs $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Mannavibes Xtal holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Isochronic has 66 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 92% of Isochronic's written reviews are positive against 100% of Mannavibes Xtal's.

Isochronic ships an update every 6 weeks, Mannavibes Xtal every 9 months. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Isochronic | Mannavibes Xtal |
| --- | --- | --- |
| Price | $5.99 | **Free** |
| Rating | [4.8 (66 ratings)](https://appshunter.io/ios/app/isochronic/id604028966/reviews) | **[5.0 (5 ratings)](https://appshunter.io/ios/app/mannavibes-xtal/id1510425475/reviews)** |
| Number of ratings | **66** | 5 |
| Positive reviews | 92.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 9 months |
| Monetization | Free | Free |
| Size | 3 MB | 87 MB |
| Requires iOS | 12.0 | **9.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 9+ | 12+ |
| Developer | [CML Studio](https://appshunter.io/developer/491766302) | [Mannavibes INC.](https://appshunter.io/developer/1510425474) |

## What reviewers say

### Isochronic

[App page](https://appshunter.io/ios/app/isochronic/id604028966)

Generate custom isochronic tones for brainwave entrainment. Mix tones with your own music, set timers, and use presets for various states like sleep or meditation. Save your favorite tones for quick access.

**Highlights:** Custom isochronic tone generation, Carrier tone adjustment, Mix with own music, Adjustable wave volume, Timer up to 59 minutes, Preset sessions, Memory slots for favorite tones

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Simple and easy to use
- ✨ Customizable tones
- 🚀 Works in the background
- 💡 Effective for focus and sleep
- ✅ Delivers isochronic tones

**What reviewers complain about**

- 🐛 Random pausing with notifications
- 🔊 Clicking effect with speakers
- 🤔 Lack of guidance on tone usage
- 🖱️ Sliders not 100% accurate
- 🗂️ Information spread out

**Reported bugs**

- Tone pauses randomly when receiving a notification
- Clicking effect in speakers
- Info buttons do not provide information

**Requested features**

- Extend timer duration
- Gradually ramp down volume at stop
- Type desired frequencies instead of scrolling
- Timer for frequency ramp duration
- Multiple sections for frequency and duration


### Mannavibes Xtal

[App page](https://appshunter.io/ios/app/mannavibes-xtal/id1510425475)

This app transforms your smartphone into a personal wellness device by generating specific PEMF frequencies. It offers 13 pre-programmed functions for therapeutic applications like pain and tension relief, utilizing natural frequencies found in healthy organisms.

**Highlights:** Smartphone wellness device, PEMF signal generator, 13 pre-programmed functions, Pain and tension relief, Natural frequency generation

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Isochronic free?

Isochronic costs $5.99, with no in-app purchases.

### Is Mannavibes Xtal free?

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

### Which has better reviews, Isochronic or Mannavibes Xtal?

Mannavibes Xtal is rated higher. Isochronic averages 4.8 out of 5 from 66 ratings, while Mannavibes Xtal averages 5.0 from 5 ratings.

### Do Isochronic or Mannavibes Xtal have ads?

Neither Isochronic nor Mannavibes Xtal shows ads.

### Which is updated more often, Isochronic or Mannavibes Xtal?

Isochronic ships an update every 6 weeks, and Mannavibes Xtal every 9 months. Most recently, Isochronic was updated on November 6, 2026 and Mannavibes Xtal on November 3, 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.*