# Relax Guru vs Castell

Relax Guru and Castell are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

## The numbers

| Metric | Relax Guru | Castell |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 12.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | — |
| Monetization | Ad-supported | — |
| Size | 76 MB | 144 MB |
| Requires iOS | **14.0** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Audioteka Group Sp. z o.o.](https://appshunter.io/developer/611164426) | [offizium next GmbH](https://appshunter.io/developer/1567883380) |

## What reviewers say

### Relax Guru

[App page](https://appshunter.io/ios/app/relax-guru/id1476801820)

This app offers guided meditations, breathing exercises, and nature sounds to help users reduce everyday stress and learn mindfulness. Explore various categories to find inner harmony, boost creativity, and cultivate self-love for a more balanced life.

**Highlights:** Guided meditations, Breathing exercises, Nature sounds, Stress reduction, Mindfulness learning, Inner harmony exercises

**Features:** Vision Pro support

**In-app purchases:** none


### Castell

[App page](https://appshunter.io/ios/app/castell/id6752015201)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Relax Guru free?

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

### Is Castell free?

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

### Do Relax Guru or Castell have ads?

Neither Relax Guru nor Castell shows ads.

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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.*