# PreVision vs Greenview G2

The clearest difference is update cadence: Greenview G2 at every 2 months against PreVision's every 7 months. PreVision's advantage is iOS requirement (11.0 vs 14.0). 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.

PreVision ships an update every 7 months, Greenview G2 every 2 months. The most recent releases landed on September 16, 2026 and May 13, 2026 respectively.

## The numbers

| Metric | PreVision | Greenview G2 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 2 months** |
| Size | 58 MB | 9 MB |
| Requires iOS | **11.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Presto Brandsäkerhet](https://appshunter.io/developer/1388983668) | [Greencon energi & miljo AB](https://appshunter.io/developer/1236146674) |

## What reviewers say

### PreVision

[App page](https://appshunter.io/ios/app/prevision/id1388983669)

**Features:** macOS Compatibility

**In-app purchases:** none


### Greenview G2

[App page](https://appshunter.io/ios/app/greenview-g2/id1581110331)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is PreVision free?

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

### Is Greenview G2 free?

Greenview G2 is free to download, with no in-app purchases.

### Do PreVision or Greenview G2 have ads?

Neither PreVision nor Greenview G2 shows ads.

### Which is updated more often, PreVision or Greenview G2?

PreVision ships an update every 7 months, and Greenview G2 every 2 months. Most recently, PreVision was updated on September 16, 2026 and Greenview G2 on May 13, 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.*