# alerte vs Harbor Safe Navigation & GPS

The clearest difference is in-app purchases: alerte at none against Harbor Safe Navigation & GPS's 2. alerte also leads on iOS requirement (15.1 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Harbor Safe Navigation & GPS sells 2 in-app purchases, starting at $3.99 per 7 days. alerte asks for nothing beyond the download.

alerte ships an update every 4 days, Harbor Safe Navigation & GPS every 3 days. Both last shipped on October 31, 2026.

## The numbers

| Metric | alerte | Harbor Safe Navigation & GPS |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 days | **Every 3 days** |
| Size | 43 MB | 7 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [LUA VICTORIA VALLE MARCOS](https://appshunter.io/developer/6805955838) | [Nicolas Renard](https://appshunter.io/developer/1224655606) |

## What reviewers say

### alerte

[App page](https://appshunter.io/ios/app/alerte-chiens/id6805955836)

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

**In-app purchases:** none


### Harbor Safe Navigation & GPS

[App page](https://appshunter.io/ios/app/harbor-safe-navigation-and-gps/id6806590400)

**Features:** macOS Compatibility, Apple Watch app

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $3.99 | per 7 days |
| Annual Subscription | $89.99 | per year |


## Frequently asked questions

### Is alerte free?

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

### Is Harbor Safe Navigation & GPS free?

Harbor Safe Navigation & GPS is free to download, with in-app purchases available.

### Do alerte or Harbor Safe Navigation & GPS have ads?

Neither alerte nor Harbor Safe Navigation & GPS shows ads.

### Which is updated more often, alerte or Harbor Safe Navigation & GPS?

alerte ships an update every 4 days, and Harbor Safe Navigation & GPS every 3 days. Most recently, alerte was updated on October 31, 2026 and Harbor Safe Navigation & GPS on October 31, 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.*