# U1 vs Deep Decibels

The clearest difference is in-app purchases: U1 at none against Deep Decibels's 2. U1 also leads on iOS requirement (15.0 vs 17.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Deep Decibels sells 2 in-app purchases, starting at $2.99 per month. U1 asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on November 3, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | U1 | Deep Decibels |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/u1-ma/id1611706331/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | Every 2 weeks |
| Monetization | Free | — |
| Size | 1 MB | 109 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Dima Koskin](https://appshunter.io/developer/1611706333) | [Alejandro Cerrillo Gutierrez](https://appshunter.io/developer/1826410785) |

## What reviewers say

### U1

[App page](https://appshunter.io/ios/app/u1-ma/id1611706331)

This mindfulness app offers a unique haptic meditation experience, allowing users to meditate for any duration without timers. It prioritizes privacy with no registration or ads, and seamlessly integrates mindful minutes into Apple Health.

**Highlights:** Haptic meditation experience, Unlimited meditation duration, No registration required, No advertisements, Apple Health integration, Privacy-focused design

**In-app purchases:** none


### Deep Decibels

[App page](https://appshunter.io/ios/app/deep-decibels/id6748611031)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Access | $2.99 | per month |
| Premium Access | $19.99 | per year |


## Frequently asked questions

### Is U1 free?

U1 is free to download, with no in-app purchases.

### Is Deep Decibels free?

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

### Do U1 or Deep Decibels have ads?

Neither U1 nor Deep Decibels shows ads.

### Which is updated more often, U1 or Deep Decibels?

U1 ships an update every 2 weeks, and Deep Decibels every 2 weeks. Most recently, U1 was updated on November 3, 2026 and Deep Decibels on November 8, 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.*