---
title: "Marijn Klok — Publisher Overview"
type: publisher
publisher: "Marijn Klok"
publisher_slug: "marijn-klok"
canonical_url: "https://marlvel.ai/publishers/marijn-klok"
last_updated: 2026-04-30T10:56:04.864Z
source: Marlvel.ai
license: CC-BY-NC-4.0
citation: "Marlvel.ai — Marijn Klok Publisher Overview"
---
## ⚠ Content Warning

This publisher's portfolio includes apps classified as sensitive (health). Information is aggregated from public sources for informational purposes only. This overview touches health-related apps. It is not medical advice.

---

# Marijn Klok — Publisher Overview

> Providing specialized utility and navigation tools to assist users with daily tasks and emergency preparedness. Focused on practical, single-purpose mobile solutions.

- **Publisher:** Marijn Klok
- **Website:** [https://soundaid.app](https://soundaid.app)
- **Overview generated:** 2026-04-30
- **License:** CC-BY-NC 4.0

## Executive summary

The publisher operates as a lean, utility-focused developer that targets specific, high-intent user needs ranging from emergency navigation to assistive audio technology. By maintaining a diverse, non-thematic portfolio, they avoid category saturation and instead focus on solving discrete functional problems. Their strategic trajectory suggests a focus on niche hardware integration, specifically leveraging AirPods for accessibility and mobile devices for field-based campaign management.

## Publisher DNA

- **Primary focus:** Utility and navigation tools
- **Scale:** indie
- **Target audience:** Individuals seeking practical solutions for emergency safety, sports scoring, assistive hearing, and professional ad management.

## Portfolio momentum

- **Velocity:** intense
- **Active apps:** 4
- **Abandoned apps:** 0
- **Last major release:** 20 days ago

Released 11 updates across 4 apps in the last 6 months, indicating a high-frequency development cycle across their entire active portfolio.

## Aggregated portfolio metrics

- **Total reviews (all apps):** 50
- **Weighted rating:** 4.66 / 5
- **Apps in portfolio:** 4

## Category breakdown

| Category | Apps | Share |
| :--- | :--- | :--- |
| Developer Tools | 1 | 25% |
| Sports | 1 | 25% |
| Utilities | 1 | 25% |
| Navigation | 1 | 25% |

## Top apps

- **Ward: Shelters and Bunkers** — Largest app by review count with 29 ratings.
- **Darts Scorekeeper - Scoreboard** — Highest-rated app with a 5.0 score.
- **SoundAid AI Voice Amplifier** — Flagship utility with a 4.8 rating.
- **ASA manager: Search Ad Tracker** — Most recent addition to the portfolio, released February 2026.

## Signature patterns

- Focus on single-purpose utility apps that solve specific, non-gaming problems.
- Hybrid monetization strategy ranging from free ad-supported tools to freemium models.
- High-frequency update cadence across the entire portfolio.
- Targeting niche user segments rather than broad consumer markets.

## Bottom line

This publisher is a highly active indie developer that successfully balances a diverse set of utility tools. Their ability to maintain a high update velocity across disparate categories suggests a disciplined, lean development process.

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