# METRA Building Doc vs APRO

The clearest difference is update cadence: METRA Building Doc at every 3 weeks against APRO's every 5 months. METRA Building Doc also leads on iOS requirement (13.6 vs 15). 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.

METRA Building Doc ships an update every 3 weeks, APRO every 5 months. The most recent releases landed on October 27, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | METRA Building Doc | APRO |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 5 months |
| Size | 14 MB | 28 MB |
| Requires iOS | **13.6** | 15 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [METRA - METALLURGICA TRAFILATI ALLUMINIO S.P.A.](https://appshunter.io/developer/438414105) | [Master Italy S.r.l.](https://appshunter.io/developer/1675035938) |

## What reviewers say

### METRA Building Doc

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

**Features:** macOS Compatibility

**In-app purchases:** none


### APRO

[App page](https://appshunter.io/ios/app/apro/id6445953320)

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

**In-app purchases:** none


## Frequently asked questions

### Is METRA Building Doc free?

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

### Is APRO free?

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

### Do METRA Building Doc or APRO have ads?

Neither METRA Building Doc nor APRO shows ads.

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

METRA Building Doc ships an update every 3 weeks, and APRO every 5 months. Most recently, METRA Building Doc was updated on October 27, 2026 and APRO on October 22, 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.*