---
title: "Kosei Suzuki — Publisher Overview"
type: publisher
publisher: "Kosei Suzuki"
publisher_slug: "kosei-suzuki"
canonical_url: "https://marlvel.ai/publishers/kosei-suzuki"
last_updated: 2026-05-08T13:08:05.744Z
source: Marlvel.ai
license: CC-BY-NC-4.0
citation: "Marlvel.ai — Kosei Suzuki Publisher Overview"
---
## ⚠ Content Warning

This publisher's portfolio includes apps classified as sensitive (kids). Information is aggregated from public sources for informational purposes only. This publisher has apps marketed to children. This overview is provided to inform parents, guardians, or professionals — not to promote the apps to minors.

---

# Kosei Suzuki — Publisher Overview

> Providing specialized utility and productivity tools for developers and creative users. Focused on precise data conversion and aesthetic customization.

- **Publisher:** Kosei Suzuki
- **Website:** [https://kidsroom.xyz](https://kidsroom.xyz)
- **Overview generated:** 2026-05-08
- **License:** CC-BY-NC 4.0

## Executive summary

Kosei Suzuki operates as a solo developer with a strategy of building high-utility, single-purpose tools that bridge the gap between technical developer requirements and niche creative needs. By maintaining a portfolio that spans from UNIX timestamp conversion to stylized camera filters and custom alarm clocks, the publisher avoids category saturation by targeting specific, underserved user workflows. The primary strategic tension lies in the high volume of abandoned legacy titles versus the continued maintenance of core utility tools, suggesting a shift toward prioritizing high-utility assets over experimental hobby projects.

## Publisher DNA

- **Primary focus:** Utility, productivity, and creative tools
- **Scale:** studio
- **Target audience:** Software developers, technical users, and creative individuals seeking personalized or niche utility applications.

## Portfolio momentum

- **Velocity:** maintenance
- **Active apps:** 3
- **Abandoned apps:** 18
- **Last major release:** 66 days ago

Released 2 updates in the last 6 months across a portfolio where the majority of titles remain unmaintained.

## Aggregated portfolio metrics

- **Total reviews (all apps):** 431
- **Weighted rating:** 4.61 / 5
- **Apps in portfolio:** 23

## Category breakdown

| Category | Apps | Share |
| :--- | :--- | :--- |
| Games | 4 | 17.4% |
| Sports | 3 | 13% |
| Education | 3 | 13% |
| Lifestyle | 3 | 13% |
| Productivity | 2 | 8.7% |
| Photo & Video | 2 | 8.7% |
| Developer Tools | 2 | 8.7% |
| Navigation | 1 | 4.3% |
| Graphics & Design | 1 | 4.3% |
| Health & Fitness | 1 | 4.3% |
| Utilities | 1 | 4.3% |

## Top apps

- **Timestamp Conversion Tool** — Flagship utility with 395 reviews and a 4.65 rating.
- **Neon Camera** — Popular creative tool with 30 reviews and a 4.4 rating.
- **Re:Alarm** — Lifestyle utility with custom audio scheduling features.
- **My Clock 2** — Creative alarm clock with hand-drawn interface support.
- **Memo Cho** — Productivity app featuring biometric security and nested note management.

## Signature patterns

- Strong focus on free-to-use utility and productivity tools
- Frequent use of custom, user-generated content elements like hand-drawn interfaces or custom audio
- Targeting of highly specific technical or creative niches
- Minimalist interface design with a focus on single-tap functionality

## Bottom line

Kosei Suzuki is a niche developer with a proven ability to capture developer-centric traffic through high-utility tools. The publisher's long-term viability depends on their ability to consolidate maintenance efforts on core assets while continuing to experiment with creative, low-friction utility apps.

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