# Protocol Zero vs MigraineSpy

The clearest difference is monetization model: MigraineSpy at free with in-app purchases against Protocol Zero's subscription. MigraineSpy also leads on ads (none vs shown) and review sentiment (100% vs 67%). Protocol Zero's advantage is ratings volume (182 vs 1) and update cadence (every 4 days vs every 10 days). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Protocol Zero sells 5 in-app purchases, starting at $12.99 per month and MigraineSpy sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

MigraineSpy 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 1, 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 MigraineSpy's.

Protocol Zero ships an update every 4 days, MigraineSpy every 10 days. The most recent releases landed on October 1, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Protocol Zero | MigraineSpy |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (182 ratings)](https://appshunter.io/ios/app/protocol-zero-sleep-sounds/id6755014746/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/migrainespy-tracker-and-diary/id6799735598/reviews)** |
| Number of ratings | **182** | 1 |
| Positive reviews | 66.7% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 4 days** | Every 10 days |
| Monetization | Subscription | **Free with in-app purchases** |
| Size | 123 MB | 38 MB |
| Requires iOS | 17.2 | **17.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 12+ | 4+ |
| Developer | [HumanOS LLC](https://appshunter.io/developer/1851339721) | [ASHA TECHNOLOGY LLC](https://appshunter.io/developer/6789197672) |

## 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 |


### MigraineSpy

[App page](https://appshunter.io/ios/app/migrainespy-tracker-and-diary/id6799735598)

Easily track migraines and related symptoms with a single tap. Log start and end times, optional details like intensity, symptoms, and medications, and view historical data in a clear calendar format. Customize the app's appearance for comfort during an attack.

**Highlights:** One-tap migraine start/end logging, Optional symptom and medication tracking, Calendar view with intensity visualization, Streak tracking for clear and consecutive days, Customizable themes and screen dimming, On-device data storage with free backups

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Leave a Tip! | $0.99 | one-time |
| A Bigger Tip | $2.99 | one-time |
| PDF Unlock | $4.99 | one-time |
| A Very Generous Tip! | $9.99 | one-time |


## Frequently asked questions

### Is Protocol Zero free?

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

### Is MigraineSpy free?

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

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

MigraineSpy is rated higher. Protocol Zero averages 4.7 out of 5 from 182 ratings, while MigraineSpy averages 5.0 from 1 ratings.

### Do Protocol Zero or MigraineSpy have ads?

Protocol Zero shows ads; MigraineSpy does not.

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

Protocol Zero ships an update every 4 days, and MigraineSpy every 10 days. Most recently, Protocol Zero was updated on October 1, 2026 and MigraineSpy on October 5, 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.*