# PreviAmbiente vs ECOMONDO and KEY

The clearest difference is update cadence: ECOMONDO and KEY at every 3 weeks against PreviAmbiente's every 7 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.

PreviAmbiente ships an update every 7 months, ECOMONDO and KEY every 3 weeks. The most recent releases landed on November 1, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | PreviAmbiente | ECOMONDO and KEY |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 3 weeks** |
| Size | 43 MB | 43 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Previnet S.p.A.](https://appshunter.io/developer/585612736) | [Italian Exhibition Group Spa](https://appshunter.io/developer/402718028) |

## What reviewers say

### PreviAmbiente

[App page](https://appshunter.io/ios/app/previambiente/id877603050)

**Features:** Vision Pro support

**In-app purchases:** none


### ECOMONDO and KEY

[App page](https://appshunter.io/ios/app/ecomondo-and-key/id6753705915)

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

**In-app purchases:** none


## Frequently asked questions

### Is PreviAmbiente free?

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

### Is ECOMONDO and KEY free?

ECOMONDO and KEY is free to download, with no in-app purchases.

### Do PreviAmbiente or ECOMONDO and KEY have ads?

Neither PreviAmbiente nor ECOMONDO and KEY shows ads.

### Which is updated more often, PreviAmbiente or ECOMONDO and KEY?

PreviAmbiente ships an update every 7 months, and ECOMONDO and KEY every 3 weeks. Most recently, PreviAmbiente was updated on November 1, 2026 and ECOMONDO and KEY on November 9, 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.*