# VM 4000 vs stratus

The clearest difference is update cadence: stratus at every 9 days against VM 4000's every 3 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.

VM 4000 ships an update every 3 months, stratus every 9 days. The most recent releases landed on October 29, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | VM 4000 | stratus |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 9 days** |
| Size | 27 MB | 28 MB |
| Requires iOS | 16.0 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Trendware](https://appshunter.io/developer/1013837171) | [Serialio Ltd.](https://appshunter.io/developer/333178140) |

## What reviewers say

### VM 4000

[App page](https://appshunter.io/ios/app/vm-4000/id1419618494)

**Features:** macOS Compatibility

**In-app purchases:** none


### stratus

[App page](https://appshunter.io/ios/app/stratus-io/id1475930587)

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

**In-app purchases:** none


## Frequently asked questions

### Is VM 4000 free?

VM 4000 is free to download, with no in-app purchases.

### Is stratus free?

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

### Do VM 4000 or stratus have ads?

Neither VM 4000 nor stratus shows ads.

### Which is updated more often, VM 4000 or stratus?

VM 4000 ships an update every 3 months, and stratus every 9 days. Most recently, VM 4000 was updated on October 29, 2026 and stratus on October 26, 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.*