---
title: "Harald Schlangmann — Publisher Overview"
type: publisher
publisher: "Harald Schlangmann"
publisher_slug: "harald-schlangmann"
canonical_url: "https://marlvel.ai/publishers/harald-schlangmann"
last_updated: 2026-04-24T07:39:02.621Z
source: Marlvel.ai
license: CC-BY-NC-4.0
citation: "Marlvel.ai — Harald Schlangmann Publisher Overview"
---
# Harald Schlangmann — Publisher Overview

> Providing automotive enthusiasts with professional-grade lap timing and performance data logging tools to optimize track day performance.

- **Publisher:** Harald Schlangmann
- **Website:** [https://gps-laptimer.de](https://gps-laptimer.de)
- **Overview generated:** 2026-04-24
- **License:** CC-BY-NC 4.0

## Executive summary

Harald Schlangmann has established a niche position in the automotive telemetry space by offering a tiered software-only solution that competes with expensive dedicated hardware. The publisher's moat is built on deep technical integration with external GPS and OBD sensors, paired with a proprietary library of over 1,300 predefined global tracks. This specialized focus on the 'prosumer' track-day market prioritizes technical depth and data accuracy over broad consumer appeal, maintaining a consistent presence in the sports category for over a decade.

## Publisher DNA

- **Primary focus:** Automotive performance telemetry and data logging
- **Scale:** indie
- **Target audience:** Automotive enthusiasts and track-day drivers seeking technical performance analysis, sensor integration, and video overlays.

## Portfolio momentum

- **Velocity:** maintenance
- **Active apps:** 3
- **Abandoned apps:** 0

The portfolio is currently in a maintenance phase with zero new releases in the last six months across its three active titles.

## Aggregated portfolio metrics

- **Total reviews (all apps):** 266
- **Weighted rating:** 3.81 / 5
- **Apps in portfolio:** 3

## Category breakdown

| Category | Apps | Share |
| :--- | :--- | :--- |
| Sports | 3 | 100% |

## Top apps

- **Harry's LapTimer Petrolhead** — Flagship performance tool with the highest review volume (150) in the portfolio.
- **Harry's LapTimer Grand Prix** — Highest-rated title (3.96 stars) offering the most advanced feature set for track enthusiasts.
- **Harry's LapTimer Rookie** — Entry-level tier for the ecosystem, focusing on core timing and commute analysis.

## Signature patterns

- Tiered product strategy (Rookie, Petrolhead, Grand Prix) targeting different user expertise levels
- Exclusively paid monetization model across the entire portfolio
- Heavy reliance on hardware integration, including device sensors, external GPS, and OBD data
- Specialized focus on the automotive sports niche with no category diversification

## Bottom line

Harald Schlangmann is a highly specialized indie publisher that successfully monetizes technical utility through a premium paid model. Their positioning as a hardware-agnostic alternative to dedicated racing telemetry systems provides a sustainable niche within the sports category.

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