# Protocol Zero: Sleep Sounds — user reviews

> 6 indexed App Store user reviews of Protocol Zero by HumanOS LLC, rated 4.74/5 from 182 ratings.

- Source: https://appshunter.io/ios/app/protocol-zero-sleep-sounds/id6755014746/reviews
- App overview in markdown: https://appshunter.io/ios/app/protocol-zero-sleep-sounds/id6755014746.md
- Rating breakdown: 5★ 131 · 4★ 14 · 3★ 1 · 2★ 0 · 1★ 2

## Most critical reviews (6 lowest-rated)

### 3/5 — Rating

*2026-04-03, version 1.2.1*

I just downloaded tonight! Geez! Give me a few nights!!

### 3/5 — First time

*2026-03-31, version 1.2.1*

Only going w/3 stars since I haven’t actually had a chance to use it for sleep yet.. Mainly wanted to add some info the app doesn’t ask… My current answers are impacted by 3 major things: First, I was discharged from hospital 2 days ago after emergency surgery to keep me alive, Second, I’m still on 8+ meds to try and win the postoperative pain and several others to prevent my reason for nearly dying from doing a repeat before I’ve even healed from the first time, and Third, I have Neurological Lupus which in and of itself puts me behind the 8ball even without the postoperative issues. I really think this app could be an excellent resource if yall added factors that are out of our control to the basic algorithms.
I’ll be back to update depending on how the app does in the next few days/weeks/whatever

### 5/5 — App awsome

*2026-04-14, version 1.2.2*

Got me back on track and i hope will get me taller

### 5/5 — help

*2026-01-20, version 1.1.2*

i made this a five star do it could pop up, but i canceled my subscription after the three day free trial and it charged me the year trial which i dont want, to add on i also deleted the app right after because the trial was able to help me so i just followed the routine fron memory

### 5/5 — Finally a sleep app that makes sense

*2025-12-07, version 1.0.1*

Really well designed and easy to use. It focuses on the sleep habits that matter most and the science behind it makes sense. When I follow the routine I feel better in the mornings.

### 5/5 — Better than Melatonin

*2025-12-05*

I’ve worn an Oura ring for two years, but seeing the data never actually changed my habits. This app has helped me get the best sleep EVER. I’m finally falling asleep naturally without needing melatonin. Simple, tough, but it works

**Developer response:** Thank you so much for sharing your experience.

We're thrilled to hear that Protocol Zero has helped you achieve natural, restful sleep and lasting habit change.
Your feedback motivates us to keep improving and supporting your sleep journey.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-03.*