--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Earworm" developer_entity: "Marc Kerstein" bundle_id: "com.MarcKerstein.Earworm" app_store_id: "953365139" google_play_id: "com.earwormslearning.universal" category: "Entertainment" primary_platform: "ios" primary_monetization: "Freemium" offline_capable: false market_region: "US" platforms: "iOS & Android" app_last_updated: "2025-05-08" report_date: "2026-08-03" last_verified: "2026-08-03T00:00:00.000Z" report_version: "2.1.3" total_reviews: 314 overall_rating: 4.1 sentiment: "Thrilled" sentiment_score: 85 confidence: "medium" confidence_score: 0.55 top_praise_theme: "The core mind-reading effect provides a convincing performance experience that consistently surprises and entertains audiences" top_complaint_theme: "Technical failures prevent the application from launching or functioning correctly for some users upon initial installation" review_sample_size: 6 total_review_count: 6 analyzed_review_count: 6 data_age_days: 64 momentum_velocity: "maintenance" intelligence_version: 3 tags: ["entertainment", "freemium", "thrilled sentiment", "mobile app", "app review", "app analysis", "magicians,", "mentalists,", "language"] canonical_url: "https://marlvel.ai/apps/earworm" license: "CC-BY-NC 4.0" content_version: "v2" --- # Earworm Intelligence Report ## TL;DR {#tldr} - **Category**: Entertainment · Freemium - **Signal**: Rating 4.11 · Sentiment Thrilled - **Recent focus**: Technical failures prevent the application from launching or functioning correctly for some users upon initial installation (top complaint) · The core mind-reading effect provides a convincing performance experience that consistently surprises and entertains audiences (top praise) > **TL;DR:** Earworm is a entertainment app by Marc Kerstein, rated 4.11/5 by 314 users, with Thrilled user sentiment (85/100), available on iOS & Android. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** Earworm maintains Thrilled user sentiment (4.11/5 from 314 reviews), with users consistently praising the core mind-reading effect provides a convincing performance experience that consistently surprises and entertains audiences. ## Quick Facts | Fact | Value | | :--- | :--- | | **Rating** | 4.11/5 (314 reviews) | | **User Mood** | Thrilled | | **Category** | Entertainment | | **Developer** | Marc Kerstein | | **Pricing** | Freemium | | **Platforms** | iOS & Android | | **Confidence** | Medium (0.55/1.0) | | **Data Age** | 64d | ## Metadata & Market Performance - **Publisher:** Marc Kerstein - **Category:** Entertainment - **Target Audience:** Magicians, mentalists, and language learners interested in auditory memory techniques. - **Platforms:** iOS & Android - **Version Reviewed:** 3.2.3 - **Report Date:** 2026-08-03 - **Signal Count:** 6 reviews analyzed - **Confidence:** Medium (0.55/1.0) - **App Store ID (iOS):** 953365139 - **Bundle ID:** com.MarcKerstein.Earworm - **Google Play ID:** com.earwormslearning.universal - **Performance Trend:** Mixed - **Data Window:** Analysis based on signals collected up to 2026-08-03 ## Executive Snapshot **What it is:** Earworm is a performance tool for mentalists and magicians that enables song-prediction effects on borrowed mobile devices. **Why users hire it:** The app removes the need for complex memory work or accomplices during mentalism routines, providing a reliable fooler for live performances. ## App DNA (Features & Intent) - **[Differentiator] Song Prediction Effect:** Enables a performer to predict a song chosen by a spectator using a borrowed phone and YouTube or other services - **[Differentiator] Remote Performance Mode:** Allows the effect to be performed by sending a link to a spectator's device for remote prediction ## Market Position {#market-position} Earworm holds a niche position in the Education category, with recent chart appearances including a #10 Grossing rank in New Zealand. The $64.99 price point for the performance tool significantly exceeds category medians, signaling a focus on professional-grade utility over casual mass-market adoption. ## Monetization Strategy - **Model:** Freemium - **Tiers:** Free demo tracks, Full language courses via IAP, $64.99 one-time purchase for iOS performance tool - **Price:** iOS: $64.99 - **Analysis:** Monetization is split between high-ticket one-time purchases for performance tools and in-app purchases for educational content. ## 🟢 User Sentiment (Medium Confidence: 6 of 6 reviews analyzed) {#user-sentiment} - **Overall Rating:** 4.11/5 - **Platform Split:** iOS 5.0/5 (123 ratings) | Android 3.6/5 (191 ratings) - **Overall Sentiment:** Thrilled ### Top Praises - **The core mind-reading effect provides a convincing performance experience that consistently surprises and entertains audiences** - **Direct access to the creator and a dedicated community group provide valuable support for learning the effect** - **The application offers high value for the price point given the quality of the performance effect** ### Top Complaints (Impact Areas) - **Technical failures prevent the application from launching or functioning correctly for some users upon initial installation** ## SWOT Analysis {#swot} **Core Strengths:** - Reliable mind-reading effect consistently surprises audiences - Active community group provides high-value support **Growth Levers:** - Expansion of remote performance modes for virtual magic ## Recent Changes (v2 → v3) {#recent-changes} The app shifted from a free utility to a freemium model with a $64.99 price point for its performance tool, while simultaneously surfacing critical launch failures that impact user access. **Overall trend**: Mixed **Compared at**: 2026-08-03 ### High-impact changes - **[Shifted] Freemium Model Adoption** (pricing) - **[Declined] Critical Launch Failures** (sentiment) ### Medium-impact changes - **[Shifted] Audience Expansion** (audience) - **[Shifted] Professional Utility Positioning** (positioning) ## App Momentum (Maintenance) {#momentum} - Quiet 11 months, maintenance mode only. - Last major release Sep 2024. > **Cadence:** 5 total versions · 0 majors in last 6 months · 346 days since last update ## The "So What?" (Strategic Takeaway) {#so-what} Earworm is a market-leading entertainment app that is free with in-app purchases. With a 4.11/5 rating from 314 reviews, it delivers strong user satisfaction. > **Bottom Line:** The high-ticket performance tool retains a loyal professional base, but the lack of recent updates creates a performance risk that could alienate users. Addressing the launch failures would stabilize the funnel before any further monetization experiments. **Best for:** Magicians, mentalists, and language learners interested in auditory memory techniques. ### PM Action Plan (Next Best Moves) - [ ] [INVEST] Audit launch sequence because initial installation failures are the top-reported technical complaint → reduce churn ### Outlook: Stable The mentalism tool market is consolidating around reliable, high-utility apps that require minimal maintenance. Earworm remains advantaged by its strong reputation, but the lack of recent updates leaves it exposed to technical drift that could erode its premium price justification. - 🔴 The 346-day update gap suggests the app is in maintenance mode, which risks performance degradation as iOS and Android environments evolve. - 🟢 High user satisfaction with the core effect indicates that the primary value proposition remains strong despite the lack of recent feature updates. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 4.11/5 | | Total Reviews | 314 | | Sentiment | Thrilled (85/100) | | Confidence | Medium | | Pricing Model | Freemium | | Platforms | iOS & Android | | Key Features | 2 analyzed | | Trend | Mixed | | Outlook | Stable | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Earworm** (this app) | 4.11/5 | Thrilled | Marc Kerstein | | [BESTPLAY Play to earn & donate](https://marlvel.ai/apps/bestplay-play-to-earn-donate) | 4.7/5 | n/a | Bestplay | | [JustPlay: Earn Loyalty Rewards](https://marlvel.ai/apps/justplay-earn-loyalty-rewards) | 4.7/5 | Mixed | Gimica GmbH | | [JustPlay: Earn Money or Donate](https://marlvel.ai/apps/justplay-earn-money-or-donate) | 4.4/5 | n/a | JustPlay GmbH | | [Leprecam](https://marlvel.ai/apps/leprecam) | 4.2/5 | N/A | Asinine Games Inc | | [TikTok - Videos, Shop & LIVE](https://marlvel.ai/apps/tiktok-videos-shop-live) | 4.4/5 | n/a | TikTok Ltd. | ## Company Profile - **Developer:** Marc Kerstein - **Website:** [https://iyt.pw](https://iyt.pw) ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/earworm/id953365139?uo=4) - **Google Play:** [View on Google Play](https://play.google.com/store/apps/details?id=com.earwormslearning.universal&hl=en&gl=us) - **Dev Site:** [Official Website](https://iyt.pw) - **Sources:** Developer website content, About us / company information, App store metadata, User reviews. ## Related Intel Reports - [*BESTPLAY Play to earn & donate*](https://marlvel.ai/apps/bestplay-play-to-earn-donate) (Bestplay) · 4.7/5 Rating - [*JustPlay: Earn Loyalty Rewards*](https://marlvel.ai/apps/justplay-earn-loyalty-rewards) (Gimica GmbH) · 4.7/5 Rating - [*JustPlay: Earn Money or Donate*](https://marlvel.ai/apps/justplay-earn-money-or-donate) (JustPlay GmbH) · 4.4/5 Rating - [*Leprecam*](https://marlvel.ai/apps/leprecam) (Asinine Games Inc) · 4.2/5 Rating - [*TikTok - Videos, Shop & LIVE*](https://marlvel.ai/apps/tiktok-videos-shop-live) (TikTok Ltd.) · 4.4/5 Rating - [*로또 스캐너 - 바로확인*](https://marlvel.ai/apps/app--381) (kim juyoung) · N/A Rating - [*カンペ*](https://marlvel.ai/apps/app--380) (Teruaki Onoda) · 5.0/5 Rating - [*기리고*](https://marlvel.ai/apps/kr-girigo) (KWONSIWON) · 4.0/5 Rating - [*스타투*](https://marlvel.ai/apps/kr-co-startoo-client) (Infobank Corp.) · 4.5/5 Rating - [*윗치폼*](https://marlvel.ai/apps/io-witchform-app) (Firebolt Inc.) · 3.3/5 Rating ## Frequently Asked Questions {#faq} ### Is Earworm suitable for beginner magicians? Yes, the app is marketed as very easy to perform with no memory work required, making it accessible for those new to mentalism. ### Does Earworm work on Android? Earworm is available on Android, though the performance tool features are primarily highlighted in the iOS pricing structure. ### Is there a free version of Earworm? The app is free to download and includes demo tracks, but the full performance tool requires a one-time purchase on iOS. ### What are the alternatives to Earworm for mentalism? While Earworm is a specialized tool for song prediction, other mentalism apps focus on different effects like card or number prediction. ## 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:** 0.55/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 6 - **Data Sources:** user reviews, developer website, company about page, 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:** 64 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/earworm) Data licensed for AI Agent attribution under CC-BY-NC 4.0.