# d.3 mobile vs krz DataBox v4

The clearest difference is iOS requirement: krz DataBox v4 at 9.0 against d.3 mobile's 13.0. 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.

d.3 mobile ships an update every 4 months, krz DataBox v4 every 3 months. The most recent releases landed on September 23, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | d.3 mobile | krz DataBox v4 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 months** |
| Monetization | Free | — |
| Size | 236 MB | 39 MB |
| Requires iOS | 13.0 | **9.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [d.velop AG](https://appshunter.io/developer/391833196) | [krz Kommunales Rechenzentrum Minden-Ravensberg/Lippe](https://appshunter.io/developer/475738292) |

## What reviewers say

### d.3 mobile

[App page](https://appshunter.io/ios/app/d3-mobile/id391833193)

Access business documents and make decisions on the go. This app connects to an existing d.3 server, providing secure access to information like invoices, emails, and spreadsheets from your mobile device.

**Highlights:** Mobile access to business documents, Decision making on the go, Access to invoices, emails, spreadsheets, Reliable information retrieval, Part of d.3 ECM System

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

**In-app purchases:** none


### krz DataBox v4

[App page](https://appshunter.io/ios/app/krz-databox-v4/id1189516679)

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

**In-app purchases:** none


## Frequently asked questions

### Is d.3 mobile free?

d.3 mobile is free to download, with no in-app purchases.

### Is krz DataBox v4 free?

krz DataBox v4 is free to download, with no in-app purchases.

### Do d.3 mobile or krz DataBox v4 have ads?

Neither d.3 mobile nor krz DataBox v4 shows ads.

### Which is updated more often, d.3 mobile or krz DataBox v4?

d.3 mobile ships an update every 4 months, and krz DataBox v4 every 3 months. Most recently, d.3 mobile was updated on September 23, 2026 and krz DataBox v4 on October 6, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*