--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Double Bass Tuner Basic" developer_entity: "Pedro Daniel Macalupu Cumpen" bundle_id: "com.daikyouju.contrabasstunerbasic" app_store_id: "1420917410" category: "Music" primary_platform: "ios" primary_monetization: "Freemium" offline_capable: false market_region: "US" platforms: "iOS" app_last_updated: "2026-04-29" report_date: "2026-10-25" last_verified: "2026-10-25T00:00:00.000Z" report_version: "4.2.5" total_reviews: 191 overall_rating: 4.2 sentiment: "Frustrated" sentiment_score: 30 confidence: "medium" confidence_score: 0.5 top_praise_theme: "Orchestra musicians find the pitch detection helpful for maintaining instrument accuracy during practice sessions" top_complaint_theme: "Inconsistent pitch detection across different string frequencies makes tuning unreliable for bass players" review_sample_size: 13 total_review_count: 13 analyzed_review_count: 13 data_age_days: 20 momentum_velocity: "maintenance" intelligence_version: 2 tags: ["music", "freemium", "frustrated sentiment", "mobile app", "app review", "app analysis", "orchestral,", "jazz,", "classical"] canonical_url: "https://marlvel.ai/apps/double-bass-tuner-basic" license: "CC-BY-NC 4.0" content_version: "v2" --- # Double Bass Tuner Basic Intelligence Report ## TL;DR {#tldr} - **Category**: Music · Freemium - **Signal**: Rating 4.18 · Sentiment Frustrated - **Recent focus**: Inconsistent pitch detection across different string frequencies makes tuning unreliable for bass players (top complaint) · Orchestra musicians find the pitch detection helpful for maintaining instrument accuracy during practice sessions (top praise) > **TL;DR:** Double Bass Tuner Basic is a music app by Pedro Daniel Macalupu Cumpen, rated 4.18/5 by 191 users, with Frustrated user sentiment (30/100), available on iOS. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** Double Bass Tuner Basic faces Frustrated user sentiment (4.18/5 from 191 reviews), with users reporting inconsistent pitch detection across different string frequencies makes tuning unreliable for bass players as the primary concern. ## Quick Facts | Fact | Value | | :--- | :--- | | **Rating** | 4.18/5 (191 reviews) | | **User Mood** | Frustrated | | **Category** | Music | | **Developer** | Pedro Daniel Macalupu Cumpen | | **Pricing** | Freemium | | **Platforms** | iOS | | **Confidence** | Medium (0.5/1.0) | | **Data Age** | 20d | ## Metadata & Market Performance - **Publisher:** Pedro Daniel Macalupu Cumpen - **Category:** Music - **Target Audience:** Orchestral, jazz, and classical double bass players requiring precise, low-frequency tuning tools. - **Platforms:** iOS - **Version Reviewed:** 4.2.5 - **Report Date:** 2026-10-25 - **Signal Count:** 13 reviews analyzed - **Confidence:** Medium (0.5/1.0) - **App Store ID (iOS):** 1420917410 - **Bundle ID:** com.daikyouju.contrabasstunerbasic - **Data Window:** Analysis based on signals collected up to 2026-10-25 ## Executive Snapshot **What it is:** Double Bass Tuner Basic is a specialized tuning utility for double bass players on iOS, featuring frequency displays and temperament calibration. **Why users hire it:** It removes the friction of manual tuning for low-frequency instruments, though technical instability currently undermines this utility. ## App DNA (Features & Intent) - **[Standard] Pitch Frequency Display:** Shows exact pitch frequency in Hz for precise instrument calibration. - **[Differentiator] A4 Temperament Calibration:** Adjusts A4 reference frequency between 392Hz and 466Hz. - **[Standard] LED Tuning Indicator:** Provides visual feedback via an LED-style interface to signal when a string is in tune. * *User Intent:* Users seek enhanced value through premium features. ## Market Position {#market-position} Double Bass Tuner Basic maintains a 4.18 rating across 191 total ratings, yet the lack of updates over the last 5 months signals a maintenance-mode posture. The reliance on IAPs for basic utility creates a monetization-to-utility gap that rivals with more stable detection algorithms exploit. ## Monetization Strategy - **Model:** Freemium - **Tiers:** Free version with core tuning, Premium tier via In-App Purchase for advanced settings, metronome, and A4 calibration - **Analysis:** Freemium model gates professional-grade utility tools behind a one-time or recurring IAP to monetize power users. ## 🔴 User Sentiment (Medium Confidence: 13 of 13 reviews analyzed) {#user-sentiment} - **Overall Rating:** 4.18/5 - **Platform Split:** iOS 4.2/5 (191 ratings) - **Overall Sentiment:** Frustrated - **Note:** The 4.18/5 store rating reflects cumulative history, while the Frustrated sentiment reflects recent user reviews analyzed by our AI pipeline. ### Top Praises - **Orchestra musicians find the pitch detection helpful for maintaining instrument accuracy during practice sessions** ### Top Complaints (Impact Areas) - **Inconsistent pitch detection across different string frequencies makes tuning unreliable for bass players** ## SWOT Analysis {#swot} **Core Strengths:** - Specialized low-frequency sensitivity provides a niche utility for contrabass players **Growth Levers:** - Bundling multi-instrument support could address user requests for a consolidated practice tool ## What's New - **Latest (v4.2.5, 5 months ago):** Introduced Metronome, A4 Calibration, and Tuning fork tools as in-app purchases, alongside hardware optimization for the latest iPhone and iPad models. ## App Momentum (Maintenance) {#momentum} - Ships ~1 major update per year. - Latest release added hardware optimization. - Quiet 5 months, no feature expansion. > **Cadence:** 1 total versions · 1 majors in last 6 months · 178 days since last update ## The "So What?" (Strategic Takeaway) {#so-what} Double Bass Tuner Basic is a music app that is free with in-app purchases. With a 4.18/5 rating from 191 reviews, it faces significant user friction. > **Bottom Line:** Double Bass Tuner Basic must pivot its development capacity toward fixing pitch-detection stability, as the current technical unreliability is the primary driver of churn. Addressing this core utility will unlock the retention potential required to justify the existing premium-tier monetization. **Best for:** Orchestral, jazz, and classical double bass players requiring precise, low-frequency tuning tools. ### PM Action Plan (Next Best Moves) - [ ] [PIVOT] Rebuild pitch-detection algorithms because users report erratic frequency displays on E and A strings → improve retention ### Outlook: Declining The market for instrument tuners is consolidating around multi-instrument, high-accuracy tools that offer free core functionality. Double Bass Tuner Basic remains exposed due to its technical instability and aggressive gating of standard features, which will likely accelerate user churn to more reliable alternatives in the coming quarters. - 🔴 Stagnant release cadence (no significant features in 5 months) signals a maintenance-mode posture that leaves the app vulnerable to more active rivals. - 🔴 Inconsistent pitch detection on core bass strings drives high-frequency complaints, which compounds the negative sentiment already visible in the latest reviews. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 4.18/5 | | Total Reviews | 191 | | Sentiment | Frustrated (30/100) | | Confidence | Medium | | Pricing Model | Freemium | | Platforms | iOS | | Key Features | 3 analyzed | | Outlook | Declining | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Double Bass Tuner Basic** (this app) | 4.18/5 | Frustrated | Pedro Daniel Macalupu Cumpen | | [SyncTimer - Ensemble Stopwatch](https://marlvel.ai/apps/synctimer-ensemble-stopwatch) | 5.0/5 | Thrilled | Sebastian Suarez-Solis | | [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 | | [クリープハイプ](https://marlvel.ai/apps/creephyp-sp-browsingapp) | N/A/5 | N/A | Fanplus, Inc. | ## Company Profile - **Developer:** Pedro Daniel Macalupu Cumpen - **Website:** [https://www.daikyoujulabs.com](https://www.daikyoujulabs.com) ## Data Sources & Links - **App Store ID:** 1420917410 - **Dev Site:** [Official Website](https://www.daikyoujulabs.com) - **Sources:** Developer website content, App store metadata, User reviews. ## Related Intel Reports - [*SyncTimer - Ensemble Stopwatch*](https://marlvel.ai/apps/synctimer-ensemble-stopwatch) (Sebastian Suarez-Solis) · 5.0/5 Rating | Excellent Sentiment - [*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 - [*¼ learn sight read music tutor*](https://marlvel.ai/apps/learn-sight-read-music-tutor) (Alain Kong) · 4.5/5 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 ## Frequently Asked Questions {#faq} ### Is Double Bass Tuner Basic accurate for all bass strings? Users report that the app struggles to detect specific bass strings like A and E, with the frequency display often jumping erratically. ### Does Double Bass Tuner Basic require payment for all features? The app uses a freemium model. While core tuning is free, advanced settings, metronome, and A4 calibration are gated behind in-app purchases. ### What is a free alternative to Double Bass Tuner Basic? Users often seek multi-instrument tuners that offer broader functionality without requiring separate purchases for each instrument type. ### Is Double Bass Tuner Basic suitable for professional orchestra use? While marketed for professional use, reviews indicate that technical instability and inconsistent detection make it unreliable for some professional practice sessions. ## 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:** 0.5/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 13 - **Data Sources:** user reviews, developer website, 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:** 20 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/double-bass-tuner-basic) Data licensed for AI Agent attribution under CC-BY-NC 4.0.