# ALERTABLU vs Sintropia

The clearest difference is update cadence: ALERTABLU at fortnightly against Sintropia's every 2 months. Sintropia's advantage is iOS requirement (13.4 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

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

ALERTABLU ships an update fortnightly, Sintropia every 2 months. The most recent releases landed on October 24, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | ALERTABLU | Sintropia |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 17.1% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 2 months |
| Monetization | Free | — |
| Size | 69 MB | 42 MB |
| Requires iOS | 15.0 | **13.4** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Prefeitura Municipal de Blumenau](https://appshunter.io/developer/1066281687) | [SINTROP TECNOLOGIA E SUSTENTABILIDADE LTDA](https://appshunter.io/developer/1724394164) |

## What reviewers say

### ALERTABLU

[App page](https://appshunter.io/ios/app/alertablu/id1066281688)

Monitor critical events in Blumenau with real-time river levels and weather forecasts. Receive personalized alerts for your registered locations and access emergency information, including escape routes during floods.

**Highlights:** Real-time river level monitoring, Flood prediction alerts, Personalized location monitoring, Detailed weather and flood data, Incident reporting to Civil Defense, Flood escape route planning

**Features:** macOS Compatibility

**In-app purchases:** none


### Sintropia

[App page](https://appshunter.io/ios/app/sintropia/id6746936723)

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

**In-app purchases:** none


## Frequently asked questions

### Is ALERTABLU free?

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

### Is Sintropia free?

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

### Do ALERTABLU or Sintropia have ads?

Neither ALERTABLU nor Sintropia shows ads.

### Which is updated more often, ALERTABLU or Sintropia?

ALERTABLU ships an update fortnightly, and Sintropia every 2 months. Most recently, ALERTABLU was updated on October 24, 2026 and Sintropia on October 18, 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.*