# Relax Utopia vs Defog

The clearest difference is update cadence: Defog at every 2 weeks against Relax Utopia's every 28 months. Relax Utopia's advantage is iOS requirement (10.0 vs 16.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Relax Utopia sells 1 one-off in-app purchase and Defog sells 2 in-app purchases, starting at $6.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Relax Utopia ships an update every 28 months, Defog every 2 weeks. Both last shipped on October 24, 2026.

## The numbers

| Metric | Relax Utopia | Defog |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.6 (5 ratings)](https://appshunter.io/ios/app/defog-quit-smoking/id6790715142/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 28 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 222 MB | 87 MB |
| Requires iOS | **10.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Alex Akimov](https://appshunter.io/developer/642035973) | [Deca Limited](https://appshunter.io/developer/6784505750) |

## What reviewers say

### Relax Utopia

[App page](https://appshunter.io/ios/app/relax-utopia-sleep-timer/id1223240574)

This app creates a calming atmosphere with a seamless slideshow of nature images and relaxing sounds. It's designed to help you unwind, meditate, or fall asleep more easily, with customizable controls for brightness and audio.

**Highlights:** Nature image slideshow, Over 30 relaxing sounds, Adjustable brightness slider, Customizable sound playlist, Seamless image fading, Separate volume controls

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Version | $2.99 | one-time |


### Defog

[App page](https://appshunter.io/ios/app/defog-quit-smoking/id6790715142)

This app offers a neuroscience-informed 61-day plan to help you quit smoking. It provides daily focused sessions, practical behavior-change tools, and immediate support for cravings with guided exercises and sound therapy. Track your progress, milestones, and money saved throughout your journey.

**Highlights:** 61-day guided quit-smoking program, Daily sound and lesson sessions, Craving SOS with breathing and sound, 20 quick craving tools, Smoke-free timer and progress tracking, Relapse tracking

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $6.99 | per 7 days |
| Yearly | $49.99 | per year |


## Frequently asked questions

### Is Relax Utopia free?

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

### Is Defog free?

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

### Do Relax Utopia or Defog have ads?

Neither Relax Utopia nor Defog shows ads.

### Which is updated more often, Relax Utopia or Defog?

Relax Utopia ships an update every 28 months, and Defog every 2 weeks. Most recently, Relax Utopia was updated on October 24, 2026 and Defog on October 24, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*