# ACMP vs WONDER onSITE

The clearest difference is update cadence: WONDER onSITE at fortnightly against ACMP's every 5 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.

ACMP ships an update every 5 months, WONDER onSITE fortnightly. Both last shipped on November 3, 2026.

## The numbers

| Metric | ACMP | WONDER onSITE |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Fortnightly** |
| Size | 101 MB | 27 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Aagon GmbH](https://appshunter.io/developer/1476401885) | [Deutsche WindGuard Systems GmbH](https://appshunter.io/developer/1542965155) |

## What reviewers say

### ACMP

[App page](https://appshunter.io/ios/app/acmp/id1476401886)

**Features:** macOS Compatibility

**In-app purchases:** none


### WONDER onSITE

[App page](https://appshunter.io/ios/app/wonder-onsite/id1542965153)

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

**In-app purchases:** none


## Frequently asked questions

### Is ACMP free?

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

### Is WONDER onSITE free?

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

### Do ACMP or WONDER onSITE have ads?

Neither ACMP nor WONDER onSITE shows ads.

### Which is updated more often, ACMP or WONDER onSITE?

ACMP ships an update every 5 months, and WONDER onSITE fortnightly. Most recently, ACMP was updated on November 3, 2026 and WONDER onSITE on November 3, 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.*