--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Numeral Conversion" developer_entity: "Charisis Iliadis" bundle_id: "com.charisis.numeralconversion" app_store_id: "1480521369" category: "Utilities" primary_platform: "ios" primary_monetization: "Free" offline_capable: false market_region: "US" platforms: "iOS & Android" app_last_updated: "2025-10-08" report_date: "2026-09-04" last_verified: "2026-09-04T00:00:00.000Z" report_version: "1.18" total_reviews: 54 overall_rating: 4 sentiment: "Mixed" sentiment_score: 55 confidence: "medium" confidence_score: 0.5 top_praise_theme: "The core application provides a satisfying experience that keeps long-term users engaged with the platform" top_complaint_theme: "The application fails to shut down properly, leaving users unable to exit the interface effectively" review_sample_size: 10 total_review_count: 10 analyzed_review_count: 10 data_age_days: 26 momentum_velocity: "zombie" intelligence_version: 3 tags: ["utilities", "free", "mixed sentiment", "mobile app", "app review", "app analysis", "students,", "historians,", "researchers"] canonical_url: "https://marlvel.ai/apps/numeral-conversion" license: "CC-BY-NC 4.0" content_version: "v2" --- # Numeral Conversion Intelligence Report ## TL;DR {#tldr} - **Category**: Utilities · Free - **Signal**: Rating 4 · Sentiment Mixed - **Recent focus**: The application fails to shut down properly, leaving users unable to exit the interface effectively (top complaint) · The core application provides a satisfying experience that keeps long-term users engaged with the platform (top praise) > **TL;DR:** Numeral Conversion is a utilities app by Charisis Iliadis, rated 4/5 by 54 users, with Mixed user sentiment (55/100), available on iOS & Android. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** Numeral Conversion shows Mixed sentiment (4/5 from 54 reviews) - users praise the core application provides a satisfying experience that keeps long-term users engaged with the platform but report issues with the application fails to shut down properly, leaving users unable to exit the interface effectively. ## Quick Facts | Fact | Value | | :--- | :--- | | **Rating** | 4/5 (54 reviews) | | **User Mood** | Mixed | | **Category** | Utilities | | **Developer** | Charisis Iliadis | | **Pricing** | Free | | **Platforms** | iOS & Android | | **Confidence** | Medium (0.5/1.0) | | **Data Age** | 26d | ## Metadata & Market Performance - **Publisher:** Charisis Iliadis - **Category:** Utilities - **Target Audience:** Students, historians, and researchers requiring conversion between decimal, Roman, and Greek numeral systems. - **Platforms:** iOS & Android - **Version Reviewed:** 1.03 - **Report Date:** 2026-09-04 - **Signal Count:** 10 reviews analyzed - **Confidence:** Medium (0.5/1.0) - **App Store ID (iOS):** 1480521369 - **Bundle ID:** com.charisis.numeralconversion - **Google Play ID:** com.charisis.numeralconversion - **Performance Trend:** Stable - **Data Window:** Analysis based on signals collected up to 2026-09-04 ## Executive Snapshot **What it is:** Numeral Conversion is a utility app for translating between Arabic, Latin, and Greek numeral systems on iOS and Android. **Why users hire it:** It removes the cognitive friction of manual conversion between ancient and modern numeral systems for academic and historical research. ## App DNA (Features & Intent) - **[Differentiator] Three-way Numeral Conversion:** Converts numbers between Arabic, Latin, and Greek systems. - **[Differentiator] Custom Keyboards:** Provides specialized input layouts for each supported numeral system. * *User Intent:* Users value self-expression and personalized experiences. - **[Standard] Live Output:** Displays conversion results in real-time as the user types. ## Market Position {#market-position} Numeral Conversion occupies a niche utility space with 54 total ratings across platforms. The lack of recent feature updates since October 2025 signals a low-priority maintenance posture. ## Monetization Strategy - **Model:** Free - **Tiers:** Free - **Analysis:** The app is distributed as a free utility with no advertisements or in-app purchases. ## 🟡 User Sentiment (Medium Confidence: 10 of 10 reviews analyzed) {#user-sentiment} - **Overall Rating:** 4/5 - **Platform Split:** Android 4.0/5 (54 ratings) - **Overall Sentiment:** Mixed ### Top Praises - **The core application provides a satisfying experience that keeps long-term users engaged with the platform** ### Top Complaints (Impact Areas) - **The application fails to shut down properly, leaving users unable to exit the interface effectively** ## SWOT Analysis {#swot} **Core Strengths:** - Specialized custom keyboards reduce input errors across distinct numeral systems. **Growth Levers:** - Expanding input capacity beyond four digits would capture researchers dealing with larger values. ## Recent Changes (v2 → v3) {#recent-changes} The app remains in a maintenance-only state, with no functional changes or updates to the core utility. The primary shift is a more precise identification of competitive threats from general-purpose calculator apps. **Overall trend**: Stable **Compared at**: 2026-09-04 ### Medium-impact changes - **[Shifted] Competitive Threat Identification** (swot) ### Low-impact changes - **[Shifted] Narrative Focus** (positioning) ## What's New - **Latest (v1.18, 11 months ago):** Minor maintenance updates. ## App Momentum (Zombie) {#momentum} - Ships minor maintenance updates only. - Last major release October 2025. > **Cadence:** 2 total versions · 0 majors in last 6 months · 330 days since last update · 1668 days avg between updates ## The "So What?" (Strategic Takeaway) {#so-what} Numeral Conversion is an utilities app that is completely free. With a 4/5 rating from 54 reviews, it shows mixed user reception. > **Bottom Line:** Removing the four-digit input constraint would transform Numeral Conversion from a limited tool into a viable research utility, unlocking value for historians who currently find the app too restrictive. **Best for:** Students, historians, and researchers requiring conversion between decimal, Roman, and Greek numeral systems. ### PM Action Plan (Next Best Moves) - [ ] [INVEST] Remove four-digit input limit because user reviews flag it as a primary frustration → unlock research use cases ### Outlook: Stable The niche utility market for numeral conversion is unlikely to see significant disruption, but Numeral Conversion's stagnant development leaves it vulnerable to feature-rich calculator alternatives. Addressing the input limit is the only lever available to prevent long-term churn among power users. - 🔴 The 11-month update gap signals maintenance-only status, which prevents the app from addressing the four-digit input limit that currently caps user utility. - ⚪ The stable 4.0-star rating suggests the core conversion logic remains reliable, even as the lack of new features limits growth potential. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 4/5 | | Total Reviews | 54 | | Sentiment | Mixed (55/100) | | Confidence | Medium | | Pricing Model | Free | | Platforms | iOS & Android | | Key Features | 3 analyzed | | Trend | Stable | | Outlook | Stable | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Numeral Conversion** (this app) | 4/5 | Mixed | Charisis Iliadis | | [Sota Connect: Secure Network](https://marlvel.ai/apps/fi-catconnect-sota) | 4.8/5 | N/A | Cat Connect | | [V2Box - V2ray Client](https://marlvel.ai/apps/v2box-v2ray-client) | 4.6/5 | n/a | techlaim | | [avoVPN Desktop](https://marlvel.ai/apps/avovpn-desktop) | N/A/5 | N/A | Avocado VPN Technologies | | [Free VPN by Free VPN .org™](https://marlvel.ai/apps/free-vpn-by-free-vpn-org) | 4.5/5 | Mixed | Free VPN LLC | | [Fusvob VPN : Super VPN 2026](https://marlvel.ai/apps/com-toplinkc-foxexcellent) | 4.5/5 | Mixed | Fuxin Technology | ## Company Profile - **Developer:** Charisis Iliadis - **Website:** [https://ellinikaprogrammata.eu/](https://ellinikaprogrammata.eu/) ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/numeral-conversion/id1480521369?uo=4) - **Google Play:** [View on Google Play](https://play.google.com/store/apps/details?id=com.charisis.numeralconversion&hl=en&gl=us) - **Dev Site:** [Official Website](https://ellinikaprogrammata.eu/) - **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) · 4.8/5 Rating - [*V2Box - V2ray Client*](https://marlvel.ai/apps/v2box-v2ray-client) (techlaim) · 4.6/5 Rating - [*avoVPN Desktop*](https://marlvel.ai/apps/avovpn-desktop) (Avocado VPN Technologies) · N/A Rating - [*Free VPN by Free VPN .org™*](https://marlvel.ai/apps/free-vpn-by-free-vpn-org) (Free VPN LLC) · 4.5/5 Rating - [*Fusvob VPN : Super VPN 2026*](https://marlvel.ai/apps/com-toplinkc-foxexcellent) (Fuxin Technology) · 4.5/5 Rating - [*Potatso*](https://marlvel.ai/apps/potatso) (Potatso Lab LTD) · 4.4/5 Rating - [*Quantumult X*](https://marlvel.ai/apps/quantumult-x) (Cross Utility Ltd) · 3.8/5 Rating - [*카톡 분석 - 오픈채팅, 카톡 채팅 분석, 통계, 검색*](https://marlvel.ai/apps/com-liger-katalkanalysispaid) (Park Sung Cheol) · N/A Rating - [*로또 황금번호 생성기*](https://marlvel.ai/apps/lotto-lottogold) (jaehwan lee) · N/A Rating - [*도사폰 (만세력 역학도구)*](https://marlvel.ai/apps/app--656) (Softchaser Company Limited) · 5.0/5 Rating ## Frequently Asked Questions {#faq} ### Is Numeral Conversion suitable for historical research? It supports Arabic, Latin, and Greek systems, but the current four-digit input limit may restrict its use for large-scale historical data. ### Does Numeral Conversion contain ads? No, the app is free and contains no advertisements or in-app purchases. ### What are the alternatives to Numeral Conversion? Users can consider general-purpose calculator apps that include numeral conversion plugins, though these may lack the specialized keyboards provided here. ## 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:** 10 - **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:** 26 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/numeral-conversion) Data licensed for AI Agent attribution under CC-BY-NC 4.0.