# Protokoll System vs Construction Log

The clearest difference is in-app purchases: Protokoll System at none against Construction Log's 9. Protokoll System also leads on iOS requirement (13.0 vs 15.0). Construction Log's advantage is update cadence (every 3 months vs every 9 months) and device support (4 vs 1). On price and ads there is nothing between them.

Both are free to download. Construction Log sells 9 in-app purchases, starting at $5.99 per month. Protokoll System asks for nothing beyond the download.

Protokoll System ships an update every 9 months, Construction Log every 3 months. The most recent releases landed on September 30, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Protokoll System | Construction Log |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 3 months** |
| Size | 16 MB | 39 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPad | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Cap3 GmbH](https://appshunter.io/developer/1029979433) | [TOBIAS ROSSMANN](https://appshunter.io/developer/1765097850) |

## What reviewers say

### Protokoll System

[App page](https://appshunter.io/ios/app/protokoll-system/id1570392017)

**Features:** macOS Compatibility

**In-app purchases:** none


### Construction Log

[App page](https://appshunter.io/ios/app/construction-log-pro-doku/id6754005836)

**Features:** Vision Pro support

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Doku (Premium) - Monthly | $5.99 | per month |
| Company Pro Monatlich | $12.99 | per month |
| Company Ultimate Jährlich | $22.99 | per month |
| Pro Doku (Premium) – Annual | $44.99 | per year |
| Company Unlimited Monatlich | $49.99 | per month |
| Company Pro Jährlich | $129.99 | per year |
| Company Ultimate Jährlich | $249.99 | per year |
| Company Unlimited Jährlich | $499.99 | per year |
| Pro Doku (Premium) - Lifetime | $89.99 | one-time |


## Frequently asked questions

### Is Protokoll System free?

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

### Is Construction Log free?

Construction Log is free to download, with in-app purchases available.

### Do Protokoll System or Construction Log have ads?

Neither Protokoll System nor Construction Log shows ads.

### Which is updated more often, Protokoll System or Construction Log?

Protokoll System ships an update every 9 months, and Construction Log every 3 months. Most recently, Protokoll System was updated on September 30, 2026 and Construction Log on October 2, 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.*