# ERM Construction On vs Arkancs

The clearest difference is update cadence: Arkancs at every 5 weeks against ERM Construction On's every 7 months. ERM Construction On's advantage is iOS requirement (8.0 vs 13.0). 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.

ERM Construction On ships an update every 7 months, Arkancs every 5 weeks. The most recent releases landed on November 7, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | ERM Construction On | Arkancs |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 5 weeks** |
| Size | 88 MB | 35 MB |
| Requires iOS | **8.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [AVEVA GROUP PLC](https://appshunter.io/developer/1416767896) | [Ahmed Mohamed](https://appshunter.io/developer/1879487812) |

## What reviewers say

### ERM Construction On

[App page](https://appshunter.io/ios/app/erm-construction-on-site/id1570238302)

**In-app purchases:** none


### Arkancs

[App page](https://appshunter.io/ios/app/arkancs/id6759556583)

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

**In-app purchases:** none


## Frequently asked questions

### Is ERM Construction On free?

ERM Construction On is free to download, with no in-app purchases.

### Is Arkancs free?

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

### Do ERM Construction On or Arkancs have ads?

Neither ERM Construction On nor Arkancs shows ads.

### Which is updated more often, ERM Construction On or Arkancs?

ERM Construction On ships an update every 7 months, and Arkancs every 5 weeks. Most recently, ERM Construction On was updated on November 7, 2026 and Arkancs on October 31, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*