# METRA Building Doc vs Windowmaker Measure

The clearest difference is in-app purchases: METRA Building Doc at none against Windowmaker Measure's 1. METRA Building Doc also leads on update cadence (every 3 weeks vs every 2 months) and iOS requirement (13.6 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. Windowmaker Measure sells 1 in-app purchase, starting at $16.99 per month. METRA Building Doc asks for nothing beyond the download.

METRA Building Doc ships an update every 3 weeks, Windowmaker Measure every 2 months. The most recent releases landed on October 16, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | METRA Building Doc | Windowmaker Measure |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Size | 14 MB | 40 MB |
| Requires iOS | **13.6** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [METRA - METALLURGICA TRAFILATI ALLUMINIO S.P.A.](https://appshunter.io/developer/438414105) | [Windowmaker Software Ltd](https://appshunter.io/developer/1038461573) |

## What reviewers say

### METRA Building Doc

[App page](https://appshunter.io/ios/app/metra-building-doc/id1577779281)

**Features:** macOS Compatibility

**In-app purchases:** none


### Windowmaker Measure

[App page](https://appshunter.io/ios/app/windowmaker-measure/id6740228358)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Windowmaker Measure Pro | $16.99 | per month |


## Frequently asked questions

### Is METRA Building Doc free?

METRA Building Doc is free to download, with no in-app purchases.

### Is Windowmaker Measure free?

Windowmaker Measure is free to download, with in-app purchases available.

### Do METRA Building Doc or Windowmaker Measure have ads?

Neither METRA Building Doc nor Windowmaker Measure shows ads.

### Which is updated more often, METRA Building Doc or Windowmaker Measure?

METRA Building Doc ships an update every 3 weeks, and Windowmaker Measure every 2 months. Most recently, METRA Building Doc was updated on October 16, 2026 and Windowmaker Measure on October 8, 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.*