# ISY vs Calmgrid

The clearest difference is in-app purchases: ISY at none against Calmgrid's 5. ISY also leads on iOS requirement (11.0 vs 15.1). Calmgrid's advantage is update cadence (every 3 days vs every 3 weeks). On price, ads and device support there is nothing between them.

Both are free to download. Calmgrid sells 5 in-app purchases, starting at $6.99 per month. ISY asks for nothing beyond the download.

ISY ships an update every 3 weeks, Calmgrid every 3 days. The most recent releases landed on October 29, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | ISY | Calmgrid |
| --- | --- | --- |
| 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 days** |
| Monetization | Free | — |
| Size | 127 MB | 56 MB |
| Requires iOS | **11.0** | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [ISY S.A.](https://appshunter.io/developer/1105620245) | [Ugur Ozan Yildiz](https://appshunter.io/developer/1783420306) |

## 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


### Calmgrid

[App page](https://appshunter.io/ios/app/calmgrid-migraine-diary/id6758041663)

**Features:** Family Sharing

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium (Monthly) | $6.99 | per month |
| Premium (Monthly) | $7.99 | per month |
| Premium (Annual) | $29.99 | per year |
| Premium (Annual) | $39.99 | per year |
| Premium (Yearly) | $59.99 | per year |


## Frequently asked questions

### Is ISY free?

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

### Is Calmgrid free?

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

### Do ISY or Calmgrid have ads?

Neither ISY nor Calmgrid shows ads.

### Which is updated more often, ISY or Calmgrid?

ISY ships an update every 3 weeks, and Calmgrid every 3 days. Most recently, ISY was updated on October 29, 2026 and Calmgrid on October 25, 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.*