# eThemis vs Construction Log

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

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

eThemis ships an update monthly, Construction Log every 3 months. The most recent releases landed on October 28, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | eThemis | Construction Log |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Monthly** | Every 3 months |
| Size | 43 MB | 41 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Herborner Pumpentechnik GmbH & Co KG](https://appshunter.io/developer/1785170253) | [TOBIAS ROSSMANN](https://appshunter.io/developer/1765097850) |

## What reviewers say

### eThemis

[App page](https://appshunter.io/ios/app/ethemis/id6739421649)

**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 | $34.99 | per month |
| Pro Doku (Premium) – Annual | $44.99 | per year |
| Company Ultimate Monatilch | $69.99 | per month |
| Company Unlimited Monatlich | $99.99 | per month |
| Company Pro Jährlich | $299.99 | per year |
| Company Ultimate Jährlich | $599.99 | per year |
| Company Unlimited Jährlich | $899.99 | per year |
| Pro Doku (Premium) - Lifetime | $89.99 | one-time |


## Frequently asked questions

### Is eThemis free?

eThemis 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 eThemis or Construction Log have ads?

Neither eThemis nor Construction Log shows ads.

### Which is updated more often, eThemis or Construction Log?

eThemis ships an update monthly, and Construction Log every 3 months. Most recently, eThemis was updated on October 28, 2026 and Construction Log on October 25, 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.*