# Ctrldoc vs WeldAssist by Weldpoly

The clearest difference is iOS requirement: Ctrldoc at 15.6 against WeldAssist by Weldpoly's 17.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Ctrldoc ships an update every 4 weeks, WeldAssist by Weldpoly monthly. The most recent releases landed on September 29, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | Ctrldoc | WeldAssist by Weldpoly |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 weeks** | Monthly |
| Size | 121 MB | 51 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Lattech Pty Ltd](https://appshunter.io/developer/1577327477) | [Weldpoly Pty Ltd](https://appshunter.io/developer/1872428113) |

## What reviewers say

### Ctrldoc

[App page](https://appshunter.io/ios/app/ctrldoc/id1461731308)

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

**In-app purchases:** none


### WeldAssist by Weldpoly

[App page](https://appshunter.io/ios/app/weldassist-by-weldpoly/id6758347699)

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

**In-app purchases:** none


## Frequently asked questions

### Is Ctrldoc free?

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

### Is WeldAssist by Weldpoly free?

WeldAssist by Weldpoly is free to download, with no in-app purchases.

### Do Ctrldoc or WeldAssist by Weldpoly have ads?

Neither Ctrldoc nor WeldAssist by Weldpoly shows ads.

### Which is updated more often, Ctrldoc or WeldAssist by Weldpoly?

Ctrldoc ships an update every 4 weeks, and WeldAssist by Weldpoly monthly. Most recently, Ctrldoc was updated on September 29, 2026 and WeldAssist by Weldpoly on September 16, 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.*