# Protocol Zero vs Drift

The clearest difference is monetization model: Drift at free with in-app purchases against Protocol Zero's subscription. Drift also leads on review sentiment (100% vs 67%) and rating (5.0 vs 4.7). Protocol Zero's advantage is ratings volume (182 vs 5). 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 Drift sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Drift 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 5, 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 Drift's.

Both ship on a similar rhythm, roughly every 4 days. The most recent releases landed on October 1, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Protocol Zero | Drift |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (182 ratings)](https://appshunter.io/ios/app/protocol-zero-sleep-sounds/id6755014746/reviews) | **[5.0 (5 ratings)](https://appshunter.io/ios/app/drift-sleep-coach/id6757983342/reviews)** |
| Number of ratings | **182** | 5 |
| Positive reviews | 66.7% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 4 days | Every 4 days |
| Monetization | Subscription | **Free with in-app purchases** |
| Size | 123 MB | 5 MB |
| Requires iOS | **17.2** | 17.6 |
| Devices | iPhone | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [HumanOS LLC](https://appshunter.io/developer/1851339721) | [Kevin Wimer](https://appshunter.io/developer/1870082628) |

## 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 |


### Drift

[App page](https://appshunter.io/ios/app/drift-sleep-coach/id6757983342)

This app analyzes your daily habits and sleep data to create a personalized plan for better rest. It identifies specific activities impacting your sleep quality and offers actionable insights to improve your energy levels and overall well-being.

**Highlights:** Personalized sleep plan, Habit analysis for sleep, Integration with wearables, Sleep data insights, Progress tracking

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Drift Premium | $4.99 | per month |
| Drift Premium | $24.99 | per year |


## Frequently asked questions

### Is Protocol Zero free?

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

### Is Drift free?

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

### Which has better reviews, Protocol Zero or Drift?

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

### Do Protocol Zero or Drift have ads?

Both Protocol Zero and Drift show ads.

### Which is updated more often, Protocol Zero or Drift?

Protocol Zero ships an update every 4 days, and Drift every 4 days. Most recently, Protocol Zero was updated on October 1, 2026 and Drift on October 20, 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.*