---
schema_type: "SoftwareApplication"
entity_type: "Mobile Application"
app_name: "KQ Sampei Legacy"
developer_entity: "Ryouta Kira"
bundle_id: "jp.kiraqtech.KQ-Sampei"
app_store_id: "1626784865"
category: "Music"
primary_platform: "ios"
primary_monetization: "Paid"
offline_capable: false
market_region: "US"
platforms: "iOS"
app_last_updated: "2025-10-02"
report_date: "2026-08-10"
last_verified: "2026-08-10T00:00:00.000Z"
report_version: "1.6.8"
total_reviews: 19
overall_rating: 4.9
sentiment: "Thrilled"
sentiment_score: 90
confidence: "low"
confidence_score: 0.3
top_praise_theme: "Extensive keyboard support allows users to perform complex musical arrangements and handle large MIDI files"
top_complaint_theme: "Settings for pan and expression reset whenever the app is closed or backgrounded"
review_sample_size: 3
total_review_count: 3
analyzed_review_count: 3
data_age_days: 6
momentum_velocity: "zombie"
intelligence_version: 3
tags: ["music", "paid", "thrilled sentiment", "mobile app", "app review", "app analysis", "music", "producers", "mobile"]
canonical_url: "https://marlvel.ai/apps/kq-sampei-legacy"
license: "CC-BY-NC 4.0"
content_version: "v2"
---

# KQ Sampei Legacy Intelligence Report

## TL;DR {#tldr}

- **Category**: Music · Paid
- **Signal**: Rating 4.89 · Sentiment Thrilled
- **Recent focus**: Settings for pan and expression reset whenever the app is closed or backgrounded (top complaint) · Extensive keyboard support allows users to perform complex musical arrangements and handle large MIDI files (top praise)

> **TL;DR:** KQ Sampei Legacy is a music app by Ryouta Kira, rated 4.89/5 by 19 users, with Thrilled user sentiment (90/100), available on iOS.
>
> **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence.

<!-- speakable-start -->
> **Key Insight:** KQ Sampei Legacy maintains Thrilled user sentiment (4.89/5 from 19 reviews), with users consistently praising extensive keyboard support allows users to perform complex musical arrangements and handle large midi files.
<!-- speakable-end -->

## Quick Facts

| Fact | Value |
| :--- | :--- |
| **Rating** | 4.89/5 (19 reviews) |
| **User Mood** | Thrilled |
| **Category** | Music |
| **Developer** | Ryouta Kira |
| **Pricing** | Paid |
| **Platforms** | iOS |
| **Confidence** | Low (0.3/1.0) |
| **Data Age** | 6d |

## Metadata & Market Performance
- **Publisher:** Ryouta Kira
- **Category:** Music
- **Target Audience:** Music producers and mobile musicians using iOS devices who require a multi-timbral sampler for SoundFont and DLS files.
- **Platforms:** iOS
- **Version Reviewed:** 1.6.8
- **Report Date:** 2026-08-10
- **Signal Count:** 3 reviews analyzed
- **Confidence:** Low (0.3/1.0)
- **App Store ID (iOS):** 1626784865
- **Bundle ID:** jp.kiraqtech.KQ-Sampei
- **Performance Trend:** Declining
- **Data Window:** Analysis based on signals collected up to 2026-08-10

<!-- section:executive-snapshot -->
## Executive Snapshot
**What it is:** KQ Sampei Legacy is a multi-timbral sampler synthesizer for iOS that supports SoundFont and DLS formats for professional music production.
**Why users hire it:** Musicians hire this tool to manage complex MIDI files and integrate custom sound sets into mobile DAW environments, but the current deprecation status forces a transition to the newer version to maintain workflow stability.
<!-- /section:executive-snapshot -->

<!-- section:features -->
## App DNA (Features & Intent)
- **[Differentiator] Audio Unit v3 and Inter-App Audio:** Functions as a plugin for host applications like GarageBand, AUM, and Cubasis.
- **[Differentiator] Streaming Load:** Enables loading of sound sets exceeding hardware RAM capacity via streaming.
- **[Standard] Multi-format Sampler Engine:** Supports Sound Font (sf2), Compressed Sound Font (sf3), and Downloadable Sound (DLS) formats.
<!-- /section:features -->

<!-- section:market-position -->
## Market Position {#market-position}

KQ Sampei Legacy maintains a 4.89-star rating across 19 reviews, reflecting high satisfaction among its niche professional user base. The lack of recent updates and official deprecation status signals a transition phase where the app's market position is effectively frozen.
<!-- /section:market-position -->

## Monetization Strategy
- **Model:** Paid
- **Tiers:** One-time purchase at $9.99
- **Price:** iOS: $9.99
- **Analysis:** The $9.99 price gate provides full access to the synthesis engine and plugin capabilities, targeting professional users.

<!-- section:sentiment -->
## 🟢 User Sentiment (Low Confidence: 3 of 3 reviews analyzed) {#user-sentiment}
- **Overall Rating:** 4.89/5
- **Platform Split:** iOS 4.9/5 (19 ratings)
- **Overall Sentiment:** Thrilled

### Top Praises
- **Extensive keyboard support allows users to perform complex musical arrangements and handle large MIDI files**
- **Integration with professional sound systems enables church music production without requiring complex software setups**
- **Stable performance during initial launch provides a reliable foundation for blending diverse audio sounds**

### Top Complaints (Impact Areas)

- **Settings for pan and expression reset whenever the app is closed or backgrounded**

<!-- /section:sentiment -->
<!-- section:swot -->
## SWOT Analysis {#swot}

**Core Strengths:**
- Audio Unit v3 integration enables professional plugin-style workflows
- Streaming load mechanism allows sound sets to exceed hardware RAM limits

**Growth Levers:**
- Migration of existing professional user base to the newer version


<!-- /section:swot -->
## Recent Changes (v2 → v3) {#recent-changes}

The product's market position has shifted from a stable legacy tool to a declining asset, with increased focus on the risks of future OS incompatibility and session instability.

**Overall trend**: Declining
**Compared at**: 2026-08-10

### High-impact changes
- **[Shifted] Outlook Trend** (positioning)

### Medium-impact changes
- **[Added] Future Compatibility Threat** (swot)
- **[Shifted] Executive Summary Focus** (positioning)

<!-- section:whats-new -->
## What's New

- **Latest (v1.6.8, 10 months ago):** Product deprecated and renamed.
<!-- /section:whats-new -->

<!-- section:momentum -->
## App Momentum (Zombie) {#momentum}

- Product officially deprecated and renamed.
- No feature updates for 10 months.

> **Cadence:** 1 total versions · 0 majors in last 6 months · 312 days since last update

<!-- /section:momentum -->

<!-- section:so-what -->
## The "So What?" (Strategic Takeaway) {#so-what}

KQ Sampei Legacy is a music app that is a paid app.
It holds a 4.89/5 rating from 19 reviews.

<!-- speakable-start -->
> **Bottom Line:** KQ Sampei Legacy serves professional musicians through robust plugin integration, but its official deprecation makes it a liability for new users, so the team must prioritize a seamless migration path to the successor version.
<!-- speakable-end -->

**Best for:** Music producers and mobile musicians using iOS devices who require a multi-timbral sampler for SoundFont and DLS files.

<!-- section:pm-actions -->
### PM Action Plan (Next Best Moves)

- [ ] [SUNSET] Sunset the legacy app and redirect all traffic to the successor version because the product is officially deprecated → eliminate support overhead
<!-- /section:pm-actions -->

<!-- section:outlook -->
### Outlook: Declining

The product is in a terminal state following its official deprecation. The team must focus entirely on migrating the existing professional user base to the newer version to prevent churn to alternative sampler platforms.

- 🔴 Official deprecation of the product halts all feature development, which forces users to migrate to the successor version to avoid future compatibility issues.
<!-- /section:outlook -->

<!-- /section:so-what -->

<!-- section:metrics -->
## Key Metrics Summary

| Metric | Value |
| :--- | :--- |
| Overall Rating | 4.89/5 |
| Total Reviews | 19 |
| Sentiment | Thrilled (90/100) |
| Confidence | Low |
| Pricing Model | Paid |
| Platforms | iOS |
| Key Features | 3 analyzed |
| Trend | Declining |
| Outlook | Declining |
<!-- /section:metrics -->

## Competitor Comparison

| App | Rating | Sentiment | Developer |
| :--- | :--- | :--- | :--- |
| **KQ Sampei Legacy** (this app) | 4.89/5 | Thrilled | Ryouta Kira |
| [BandLab – Music Maker & Beats](https://marlvel.ai/apps/bandlab-music-maker-beats) | 4.8/5 | Excited | BandLab Singapore Pte Ltd |
| [Suno - AI Songs, Music, Lyrics](https://marlvel.ai/apps/suno-ai-songs-music) | 4.0/5 | Mixed | Suno, Inc. |
| [ヨルシカ](https://marlvel.ai/apps/com-yorushika-sp) | 4.8/5 | N/A | Fanplus, Inc. |
| [あいみょん](https://marlvel.ai/apps/net-aimyong-sp) | 4.5/5 | N/A | Fanplus, Inc. |
| [イントリズム](https://marlvel.ai/apps/jp-rc-into-rhythm) | 3.5/5 | N/A | RedinC |

## Company Profile
- **Developer:** Ryouta Kira

## Data Sources & Links
- **App Store:** [View on Apple Store](https://apps.apple.com/us/app/kq-sampei-legacy/id1626784865?uo=4)
- **Sources:** App store metadata, User reviews.

## Related Intel Reports
- [*BandLab – Music Maker & Beats*](https://marlvel.ai/apps/bandlab-music-maker-beats) (BandLab Singapore Pte Ltd) · 4.8/5 Rating | Positive Sentiment
- [*Suno - AI Songs, Music, Lyrics*](https://marlvel.ai/apps/suno-ai-songs-music) (Suno, Inc.) · 4.0/5 Rating
- [*ヨルシカ*](https://marlvel.ai/apps/com-yorushika-sp) (Fanplus, Inc.) · 4.8/5 Rating
- [*あいみょん*](https://marlvel.ai/apps/net-aimyong-sp) (Fanplus, Inc.) · 4.5/5 Rating
- [*イントリズム*](https://marlvel.ai/apps/jp-rc-into-rhythm) (RedinC) · 3.5/5 Rating
- [*クリープハイプ*](https://marlvel.ai/apps/creephyp-sp-browsingapp) (Fanplus, Inc.) · N/A Rating
- [*マカロニえんぴつ*](https://marlvel.ai/apps/com-macaroniempitsu-fc) (Fanplus, Inc.) · 3.1/5 Rating
- [*100.1 Jack FM*](https://marlvel.ai/apps/100-1-jack-fm) (NRG Media) · 1.0/5 Rating
- [*100.1 WJRZ*](https://marlvel.ai/apps/100-1-wjrz) (Beasley Broadcast Group) · 4.8/5 Rating | Excellent Sentiment
- [*100.3 The Wolf*](https://marlvel.ai/apps/100-3-the-wolf) (SummitMedia, LLC) · 4.1/5 Rating

## Methodology {#methodology}

This report was generated by Marlvel.ai's 5-stage AI intelligence pipeline:

1. **Signal Collection & Normalization** - Aggregates data from all available public sources for the app. Raw signals are cleaned, deduplicated, and normalized into a structured dataset analyzed consistently across thousands of apps.
2. **Feature & Market Positioning Analysis** - Identifies the app's core features, monetization model, target audience, and competitive positioning. Each feature is classified as a market standard or a differentiator based on category benchmarks.
3. **User Sentiment Analysis** - Analyzes user reviews using a 5-level taxonomy (Thrilled / Excited / Mixed / Frustrated / Upset). Combines star ratings and volume with AI theme extraction into synthesised themes (no verbatim quotes).
4. **Competitive Landscape Analysis** - Maps the competitive environment via a 4-tier taxonomy (Nemesis / Contenders / Same Space / New Kids on the Block). Prioritizes same sub-genre over broad category.
5. **Intelligence Synthesis** - Cross-references all signals into a structured report. Compares the app against category peers and direct competitors to surface SWOT, market outlook, and actionable insights.

- **Confidence Score:** 0.3/1.0 (based on review volume, data source diversity, and signal quality)
- **Reviews Analyzed:** 3
- **Data Sources:** user reviews, App Store metadata
- **Rating Method:** Weighted average across platforms (iOS & Android), weighted by review count per platform
- **Independence:** Fully independent analysis. No publisher sponsorship or editorial influence.
- **Report Age:** 6 days since last refresh

---
© 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/kq-sampei-legacy)
Data licensed for AI Agent attribution under CC-BY-NC 4.0.