# ISY vs Headache & Migraine Diary °

The clearest difference is in-app purchases: ISY at none against Headache & Migraine Diary °'s 3. ISY also leads on iOS requirement (11.0 vs 15.1). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Headache & Migraine Diary ° sells 3 in-app purchases, starting at $4.99 per 7 days. ISY asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 22, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | ISY | Headache & Migraine Diary ° |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/isy/id878295958/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | Free | — |
| Size | 127 MB | 76 MB |
| Requires iOS | **11.0** | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ISY S.A.](https://appshunter.io/developer/1105620245) | [Joseph Stein](https://appshunter.io/developer/535382667) |

## What reviewers say

### ISY

[App page](https://appshunter.io/ios/app/isy/id878295958)

This platform offers safety services to help users monitor their communities and loved ones. It provides emergency assistance, location tracking, and alerts for dangerous zones. Users become community safety agents by participating.

**Highlights:** Emergency services, Assistance services, Location tracking, Video monitoring, Alarm system, GPS tracking, Dangerous zone alerts

**Features:** macOS Compatibility

**In-app purchases:** none


### Headache & Migraine Diary °

[App page](https://appshunter.io/ios/app/headache-and-migraine-diary/id6759279921)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $4.99 | per 7 days |
| Yearly | $24.90 | per year |
| Lifetime | $49.99 | one-time |


## Frequently asked questions

### Is ISY free?

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

### Is Headache & Migraine Diary ° free?

Headache & Migraine Diary ° is free to download, with in-app purchases available.

### Do ISY or Headache & Migraine Diary ° have ads?

Neither ISY nor Headache & Migraine Diary ° shows ads.

### Which is updated more often, ISY or Headache & Migraine Diary °?

ISY ships an update every 3 weeks, and Headache & Migraine Diary ° every 3 weeks. Most recently, ISY was updated on October 22, 2026 and Headache & Migraine Diary ° on October 10, 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.*