---
title: "Hendrik Holtmann — Publisher Overview"
type: publisher
publisher: "Hendrik Holtmann"
publisher_slug: "hendrik-holtmann"
canonical_url: "https://marlvel.ai/publishers/hendrik-holtmann"
last_updated: 2026-04-28T07:31:25.769Z
source: Marlvel.ai
license: CC-BY-NC-4.0
citation: "Marlvel.ai — Hendrik Holtmann Publisher Overview"
---
## ⚠ Content Warning

This publisher's portfolio includes apps classified as sensitive (finance). Information is aggregated from public sources for informational purposes only. This overview touches financial apps. It is not financial or investment advice.

---

# Hendrik Holtmann — Publisher Overview

> Providing travelers and business professionals with reliable, offline-first currency conversion tools for international mobility.

- **Publisher:** Hendrik Holtmann
- **Website:** [https://eidac.de](https://eidac.de)
- **Overview generated:** 2026-04-28
- **License:** CC-BY-NC 4.0

## Executive summary

Holtmann operates as a utility specialist, focusing on a high-reliability niche within the travel category. The strategy centers on an offline-first architecture, creating a functional moat for users in low-connectivity environments where standard web-dependent converters fail. This single-asset focus suggests a maintenance-heavy approach that prioritizes long-term utility and user retention over aggressive portfolio expansion or diversified monetization.

## Publisher DNA

- **Primary focus:** Travel utility and currency conversion tools
- **Scale:** indie
- **Target audience:** International travelers and business professionals requiring reliable currency tracking and historical exchange data without constant internet access.

## Portfolio momentum

- **Velocity:** steady
- **Active apps:** 1
- **Abandoned apps:** 0
- **Last major release:** 59 days ago

Maintains a single active utility with a major update within the last 60 days, indicating a consistent maintenance cycle for its flagship asset.

## Aggregated portfolio metrics

- **Total reviews (all apps):** 22,185
- **Weighted rating:** 4.67 / 5
- **Apps in portfolio:** 1

## Category breakdown

| Category | Apps | Share |
| :--- | :--- | :--- |
| Travel | 1 | 100% |

## Top apps

- **eCurrency - Currency Converter** — Sole flagship title with over 22,000 reviews and a 4.67 weighted rating.

## Signature patterns

- Focus on offline-first functionality for travel utilities
- Integration of historical data visualization via graphical charts
- Clean, multi-converter interface design
- Monetization via a 100% free access model

## Bottom line

Hendrik Holtmann is a disciplined indie developer with a clearly defined niche in the travel utility space. The portfolio's strength lies in the high user sentiment and reliability of its single flagship, positioning it as a stable, utility-driven alternative to more complex financial tools.

---
© 2026 Marlvel.ai | [Publisher apps index](https://marlvel.ai/api/llm/publishers/hendrik-holtmann) | [Methodology](https://marlvel.ai/api/llm/methodology)
Data licensed under CC-BY-NC 4.0.

---
© 2026 Marlvel.ai | [Full publisher profile](https://marlvel.ai/publishers/hendrik-holtmann) | [Publisher apps index](https://marlvel.ai/api/llm/publishers/hendrik-holtmann) | [Methodology](https://marlvel.ai/api/llm/methodology)
Data licensed under CC-BY-NC 4.0.