# Protocol Zero vs Sleep Meditations

The clearest difference is monetization model: Sleep Meditations at free with in-app purchases against Protocol Zero's subscription. Sleep Meditations also leads on review sentiment (100% vs 67%) and rating (5.0 vs 4.7). Protocol Zero's advantage is ratings volume (182 vs 2). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Protocol Zero sells 5 in-app purchases, starting at $12.99 per month and Sleep Meditations sells 2 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.

Sleep Meditations holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Protocol Zero has 182 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 67% of Protocol Zero's written reviews are positive against 100% of Sleep Meditations's.

Protocol Zero ships an update every 4 days, Sleep Meditations every 3 days. The most recent releases landed on October 1, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Protocol Zero | Sleep Meditations |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (182 ratings)](https://appshunter.io/ios/app/protocol-zero-sleep-sounds/id6755014746/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/sleep-meditations/id6755146174/reviews)** |
| Number of ratings | **182** | 2 |
| Positive reviews | 66.7% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 4 days | **Every 3 days** |
| Monetization | Subscription | **Free with in-app purchases** |
| Size | 123 MB | 66 MB |
| Requires iOS | 17.2 | **16.6** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 12+ | 4+ |
| Developer | [HumanOS LLC](https://appshunter.io/developer/1851339721) | [Padadaz](https://appshunter.io/developer/288177711) |

## What reviewers say

### Protocol Zero

[App page](https://appshunter.io/ios/app/protocol-zero-sleep-sounds/id6755014746)

This app provides a personalized daily plan to improve sleep quality, incorporating science-backed techniques and sleep sounds. It guides users through setting consistent wake times, managing caffeine intake, and activating wind-down routines for better rest.

**Highlights:** Personalized daily sleep plan, Sleep sounds (white noise, rain), Consistent wake time guidance, Caffeine cutoff reminders, Wind-down mode, CBT-I techniques

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Protocol Zero Monthly | $12.99 | per month |
| Protocol Zero Annual Starter | $19.99 | per year |
| Protocol Zero Annual | $29.99 | per year |
| Protocol Zero Pro | $39.99 | per year |
| Protocol Zero Pro | $59.99 | per year |


### Sleep Meditations

[App page](https://appshunter.io/ios/app/sleep-meditations/id6755146174)

This app offers guided meditations, relaxing music, and interactive touch experiences to help you achieve deeper calm and better sleep. It includes breathing exercises and customizable rituals for both nighttime and daytime relaxation.

**Highlights:** Guided meditations and sleep stories, Relaxing music and soundscapes, Interactive hypnotic touch surfaces, Cardiac coherence breathing exercises, Customizable relaxation rituals, Sessions for sleep, stress, and anxiety

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Plan | $5.99 | per month |
| Yearly Plan | $49.99 | per year |


## Frequently asked questions

### Is Protocol Zero free?

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

### Is Sleep Meditations free?

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

### Which has better reviews, Protocol Zero or Sleep Meditations?

Sleep Meditations is rated higher. Protocol Zero averages 4.7 out of 5 from 182 ratings, while Sleep Meditations averages 5.0 from 2 ratings.

### Do Protocol Zero or Sleep Meditations have ads?

Both Protocol Zero and Sleep Meditations show ads.

### Which is updated more often, Protocol Zero or Sleep Meditations?

Protocol Zero ships an update every 4 days, and Sleep Meditations every 3 days. Most recently, Protocol Zero was updated on October 1, 2026 and Sleep Meditations on October 16, 2026.

---

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