# SISS vs SelvaApp

The clearest difference is update cadence: SISS at every 4 months against SelvaApp's every 11 months. 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.

SISS ships an update every 4 months, SelvaApp every 11 months. The most recent releases landed on October 26, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | SISS | SelvaApp |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 57.1% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 11 months |
| Monetization | — | Free |
| Size | 48 MB | 40 MB |
| Requires iOS | 16.4 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Servicos e Informacoes do Brasil](https://appshunter.io/developer/1475781851) | [Rodrigo Augusto Ferreira de Souza](https://appshunter.io/developer/1718475996) |

## What reviewers say

### SISS

[App page](https://appshunter.io/ios/app/siss-geo/id1291912325)

**In-app purchases:** none


### SelvaApp

[App page](https://appshunter.io/ios/app/selvaapp/id6473133697)

Access real-time and historical environmental data for air quality, wildfires, and storms across the Amazon, Brazil, and South America. Receive custom alerts based on your monitored sensors and areas. Plan outdoor activities with 7-day forecasts and health recommendations.

**Highlights:** Real-time air quality data, Wildfire and storm occurrence, 7-day weather forecasts, Customizable alerts, Health recommendations, Historical data visualization

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

**In-app purchases:** none


## Frequently asked questions

### Is SISS free?

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

### Is SelvaApp free?

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

### Do SISS or SelvaApp have ads?

Neither SISS nor SelvaApp shows ads.

### Which is updated more often, SISS or SelvaApp?

SISS ships an update every 4 months, and SelvaApp every 11 months. Most recently, SISS was updated on October 26, 2026 and SelvaApp 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.*