--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Decibel Meter+ Sound Level dB" developer_entity: "Kyu-Hee Jang" bundle_id: "com.simonj.noisemeter" app_store_id: "1593197145" category: "Utilities" primary_platform: "ios" primary_monetization: "Freemium" offline_capable: false market_region: "US" platforms: "iOS & Android" app_last_updated: "2026-09-25" report_date: "2026-10-08" last_verified: "2026-10-08T00:00:00.000Z" report_version: "3.2.30" total_reviews: 2 overall_rating: 3 sentiment: "Frustrated" sentiment_score: 30 confidence: "medium" confidence_score: 0.5 top_praise_theme: "The core database checking functionality provides value for users who appreciate the free access model" top_complaint_theme: "Frequent pop-up advertisements interrupt the user experience to the point of making the app unusable" review_sample_size: 9 total_review_count: 9 analyzed_review_count: 9 data_age_days: 37 momentum_velocity: "steady" intelligence_version: 2 tags: ["utilities", "freemium", "frustrated sentiment", "mobile app", "app review", "app analysis", "individuals", "needing", "monitor"] canonical_url: "https://marlvel.ai/apps/sound-noise-meter-db-spl" license: "CC-BY-NC 4.0" content_version: "v2" --- # Decibel Meter+ Sound Level dB Intelligence Report ## TL;DR {#tldr} - **Category**: Utilities · Freemium - **Signal**: Rating 3 · Sentiment Frustrated - **Recent focus**: Frequent pop-up advertisements interrupt the user experience to the point of making the app unusable (top complaint) · The core database checking functionality provides value for users who appreciate the free access model (top praise) > **TL;DR:** Decibel Meter+ Sound Level dB is a utilities app by Kyu-Hee Jang, rated 3/5 by 2 users, with Frustrated user sentiment (30/100), available on iOS & Android. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** Decibel Meter+ Sound Level dB faces Frustrated user sentiment (3/5 from 2 reviews), with users reporting frequent pop-up advertisements interrupt the user experience to the point of making the app unusable as the primary concern. ## Quick Facts | Fact | Value | | :--- | :--- | | **Rating** | 3/5 (2 reviews) | | **User Mood** | Frustrated | | **Category** | Utilities | | **Developer** | Kyu-Hee Jang | | **Pricing** | Freemium | | **Platforms** | iOS & Android | | **Confidence** | Medium (0.5/1.0) | | **Data Age** | 37d | ## Metadata & Market Performance - **Publisher:** Kyu-Hee Jang - **Category:** Utilities - **Target Audience:** Individuals needing to monitor noise levels in workplaces, classrooms, or residential environments for personal reference. - **Platforms:** iOS & Android - **Version Reviewed:** 3.2.30 - **Report Date:** 2026-10-08 - **Signal Count:** 9 reviews analyzed - **Confidence:** Medium (0.5/1.0) - **App Store ID (iOS):** 1593197145 - **Bundle ID:** com.simonj.noisemeter - **Google Play ID:** com.simonj.noisemeter - **Data Window:** Analysis based on signals collected up to 2026-10-08 ## Executive Snapshot **What it is:** Decibel Meter+ Sound Level dB is a mobile utility for real-time acoustic monitoring and noise dosimetry on iOS and Android. **Why users hire it:** The app removes the need for dedicated sound-level hardware by providing a calibrated, mobile-first interface for everyday noise exposure tracking. ## App DNA (Features & Intent) - **[Differentiator] Noise Dosimeter:** Calculates daily noise dose percentage and 8-hour time-weighted average based on WHO or OSHA standards. * *User Intent:* Users are motivated by consistent progression and daily incentives. - **[Standard] Session Logging:** Records LAeq, Lmax, L10, and L90 metrics for sessions over 30 seconds, exportable as CSV. - **[Differentiator] Calibration Offset:** Adjusts microphone sensitivity between -20 and +20 dB against a reference meter. * *User Intent:* Users expect intelligent, adaptive experiences that learn from their behavior. ## Market Position {#market-position} Decibel Meter+ Sound Level dB occupies a niche within the Utilities category, competing on professional-grade dosimetry features rather than pure measurement simplicity. The app's reliance on rewarded video for reporting indicates a focus on ad-driven monetization over direct paid acquisition. ## Monetization Strategy - **Model:** Freemium - **Tiers:** Free with ads, Rewarded video to unlock summary reports - **Analysis:** Monetization relies on ad-supported inventory and rewarded video gates for advanced reporting features. ## 🔴 User Sentiment (Medium Confidence: 9 of 9 reviews analyzed) {#user-sentiment} - **Overall Rating:** 3/5 - **Platform Split:** iOS 3.0/5 (2 ratings) - **Overall Sentiment:** Frustrated ### Top Praises - **The core database checking functionality provides value for users who appreciate the free access model** ### Top Complaints (Impact Areas) - **Frequent pop-up advertisements interrupt the user experience to the point of making the app unusable** ## SWOT Analysis {#swot} **Core Strengths:** - WHO and OSHA dosimetry standards provide professional-grade utility - Calibration offset tool builds trust in measurement accuracy **Growth Levers:** - Subscription-based ad-free tier could capture users frustrated by current pop-up frequency ## What's New - **Latest (v3.2.30, 1 weeks ago):** Relocated the Start button for gauge-tap activation and added post-measurement summaries for sessions exceeding 30 seconds. Users can now view full-session dose data for WHO and OSHA standards. ## App Momentum (Steady) {#momentum} - Shipped session summary card update - Added standard-specific dose calculations - Refined UI with cleaner line icons > **Cadence:** 2 total versions · 1 majors in last 6 months · 13 days since last update · 25 days avg between updates ## The "So What?" (Strategic Takeaway) {#so-what} Decibel Meter+ Sound Level dB is an utilities app that is free with in-app purchases. With a 3/5 rating from 2 reviews, it faces significant user friction. > **Bottom Line:** Decibel Meter+ Sound Level dB provides professional-grade dosimetry tools that retain core users, but the current ad-heavy monetization model creates a churn risk that outweighs the revenue gains. Addressing functional reliability and ad friction would stabilize the user base. **Best for:** Individuals needing to monitor noise levels in workplaces, classrooms, or residential environments for personal reference. ### PM Action Plan (Next Best Moves) - [ ] [PIVOT] Audit ad placement frequency because high ad volume is the #1 complaint theme → improve retention ### Outlook: Mixed The app is currently in a state of tension between its professional-grade utility and an aggressive ad-supported monetization model. While the latest update introduces meaningful dosimetry features, the negative sentiment regarding ad frequency threatens to cap the user base before these features can drive long-term retention. - 🔴 Excessive ad frequency interrupts measurement sessions, which directly erodes the daily active habit and drives negative sentiment. - 🟢 The latest update adds professional-grade WHO and OSHA dose calculations, showing active investment in utility-focused features. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 3/5 | | Total Reviews | 2 | | Sentiment | Frustrated (30/100) | | Confidence | Medium | | Pricing Model | Freemium | | Platforms | iOS & Android | | Key Features | 3 analyzed | | Outlook | Mixed | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Decibel Meter+ Sound Level dB** (this app) | 3/5 | Frustrated | Kyu-Hee Jang | | [Sota Connect: Secure Network](https://marlvel.ai/apps/fi-catconnect-sota) | 4.9/5 | N/A | Cat Connect | | [V2Box - V2ray Client](https://marlvel.ai/apps/v2box-v2ray-client) | 4.6/5 | n/a | techlaim | | [App For Siri Commands Tips](https://marlvel.ai/apps/app-for-siri-commands-tips) | N/A/5 | N/A | Anh La Phan Son | | [avoVPN Desktop](https://marlvel.ai/apps/avovpn-desktop) | N/A/5 | N/A | Avocado VPN Technologies | | [Bin Days - Bin Reminder](https://marlvel.ai/apps/bin-days-bin-reminder) | N/A/5 | N/A | Vicki Partridge | ## Company Profile - **Developer:** Kyu-Hee Jang - **Website:** [https://simon-jang.blogspot.com/](https://simon-jang.blogspot.com/) ## Data Sources & Links - **App Store ID:** 1593197145 - **Google Play ID:** com.simonj.noisemeter - **Dev Site:** [Official Website](https://simon-jang.blogspot.com/) - **Sources:** Developer website content, App store metadata, User reviews. ## Related Intel Reports - [*Sota Connect: Secure Network*](https://marlvel.ai/apps/fi-catconnect-sota) (Cat Connect) · 4.9/5 Rating - [*V2Box - V2ray Client*](https://marlvel.ai/apps/v2box-v2ray-client) (techlaim) · 4.6/5 Rating - [*App For Siri Commands Tips*](https://marlvel.ai/apps/app-for-siri-commands-tips) (Anh La Phan Son) · N/A Rating - [*avoVPN Desktop*](https://marlvel.ai/apps/avovpn-desktop) (Avocado VPN Technologies) · N/A Rating - [*Bin Days - Bin Reminder*](https://marlvel.ai/apps/bin-days-bin-reminder) (Vicki Partridge) · N/A Rating - [*Controller Tester FGC*](https://marlvel.ai/apps/controller-tester-fgc) (Aaron Lowe) · 5.0/5 Rating - [*Fusvob VPN : Super VPN 2026*](https://marlvel.ai/apps/com-toplinkc-foxexcellent) (Fuxin Technology) · 4.5/5 Rating - [*Gear Ratio Calculator & RPM*](https://marlvel.ai/apps/cog-gear-ratio-calculator) (Linh Phan Nhat Khanh) · N/A Rating - [*MDflow Web Clipper*](https://marlvel.ai/apps/mdflow-web-clipper) (DataOps, s.r.o.) · N/A Rating - [*NordVPN: VPN Fast & Secure*](https://marlvel.ai/apps/com-nordvpn-nordvpn) (Nordvpn S.A.) · 4.7/5 Rating ## Frequently Asked Questions {#faq} ### Is Decibel Meter+ Sound Level dB accurate enough for professional use? No, the app is designed for everyday checks and personal reference. The developer explicitly states it is not a certified sound level meter and should not be used for legal or compliance measurements. ### Does Decibel Meter+ Sound Level dB have intrusive ads? Users report that frequent pop-up advertisements interrupt the user experience to the point of making the app difficult to use. ### What is the difference between this and a standard decibel meter app? Decibel Meter+ Sound Level dB includes a noise dosimeter that calculates daily dose percentages and 8-hour time-weighted averages based on WHO and OSHA standards, which is not standard in basic measurement apps. ## 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:** 9 - **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:** 37 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/sound-noise-meter-db-spl) Data licensed for AI Agent attribution under CC-BY-NC 4.0.