# PSD vs Alerta

The clearest difference is ads: PSD at none against Alerta's shown. Alerta's advantage is update cadence (every 4 days vs every 3 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

PSD ships an update every 3 months, Alerta every 4 days. The most recent releases landed on September 7, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | PSD | Alerta |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Every 4 days** |
| Monetization | — | Free |
| Size | 18 MB | 16 MB |
| Requires iOS | **17.0** | 18.6 |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [PSD - Partido Social Democrata](https://appshunter.io/developer/1460828250) | [Walter Tengler](https://appshunter.io/developer/1860699717) |

## What reviewers say

### PSD

[App page](https://appshunter.io/ios/app/psd/id1462311643)

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

**In-app purchases:** none


### Alerta

[App page](https://appshunter.io/ios/app/alerta/id6759662896)

Stay informed about active incidents across Portugal with real-time map updates and notifications. Report new events, track emergency response efforts, and filter information by type. Users can build a reputation for reliable reporting.

**Highlights:** Real-time incident map, Report new incidents, Receive location-based alerts, View deployed resources, Filter incidents by type, User reporting reputation system

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is PSD free?

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

### Is Alerta free?

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

### Do PSD or Alerta have ads?

Alerta shows ads; PSD does not.

### Which is updated more often, PSD or Alerta?

PSD ships an update every 3 months, and Alerta every 4 days. Most recently, PSD was updated on September 7, 2026 and Alerta on September 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.*