--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "SFX Scientific Calculator" developer_entity: "Wai Kwong Lee" bundle_id: "com.eefelix.SFX-Calc" app_store_id: "1548427958" category: "Utilities" primary_platform: "ios" primary_monetization: "Free" offline_capable: false market_region: "US" platforms: "iOS" app_last_updated: "2026-09-07" report_date: "2026-10-04" last_verified: "2026-10-04T00:00:00.000Z" report_version: "6.7" total_reviews: 144 overall_rating: 4.7 confidence: "low" confidence_score: 0.2 data_age_days: 42 momentum_velocity: "maintenance" intelligence_version: 2 tags: ["utilities", "free", "mobile app", "app review", "app analysis", "students", "engineers", "requiring"] canonical_url: "https://marlvel.ai/apps/sfx-scientific-calculator" license: "CC-BY-NC 4.0" content_version: "v2" --- # SFX Scientific Calculator Intelligence Report ## TL;DR {#tldr} - **Category**: Utilities · Free - **Signal**: Rating 4.66 > **TL;DR:** SFX Scientific Calculator is a utilities app by Wai Kwong Lee, rated 4.66/5 by 144 users, available on iOS. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** SFX Scientific Calculator is a utilities app by Wai Kwong Lee. ## Quick Facts | Fact | Value | | :--- | :--- | | **Rating** | 4.66/5 (144 reviews) | | **Category** | Utilities | | **Developer** | Wai Kwong Lee | | **Pricing** | Free | | **Platforms** | iOS | | **Confidence** | Low (0.2/1.0) | | **Data Age** | 42d | ## Metadata & Market Performance - **Publisher:** Wai Kwong Lee - **Category:** Utilities - **Target Audience:** Students and engineers requiring a handheld-style scientific calculator for coursework, laboratory work, and technical calculations. - **Platforms:** iOS - **Version Reviewed:** 6.7 - **Report Date:** 2026-10-04 - **Signal Count:** 0 reviews analyzed - **Confidence:** Low (0.2/1.0) - **App Store ID (iOS):** 1548427958 - **Bundle ID:** com.eefelix.SFX-Calc - **Data Window:** Analysis based on signals collected up to 2026-10-04 ## Executive Snapshot **What it is:** SFX Scientific Calculator is a handheld-style scientific calculator for students and engineers on iOS and Mac. **Why users hire it:** It removes the friction of repeated engineering calculations by providing persistent formula memory and specialized Base-N modes. ## App DNA (Features & Intent) - **[Differentiator] Base-N Mode:** Supports binary, octal, decimal, and hexadecimal calculations with integer enforcement. - **[Differentiator] Formula Memory:** Stores input variables and output results in 10 volatile memory registers for repeated formula execution. - **[Differentiator] Constant Operand Calculation:** Allows fixing one operand as a constant for repeated arithmetic operations. ## Market Position {#market-position} SFX Scientific Calculator occupies a niche in the Utilities category, maintaining a 4.66-star rating across 144 reviews. The absence of monetization gates suggests a developer-led utility model rather than a commercial-scale focus. ## Monetization Strategy - **Model:** Free - **Tiers:** Free - **Analysis:** The app is distributed as a free utility with no visible subscription or IAP gates. ## SWOT Analysis {#swot} **Core Strengths:** - Formula memory registers enable repeated engineering workflows - Base-N mode provides specialized utility for technical users **Growth Levers:** - Cloud-sync for formula registers would increase user retention ## What's New - **Latest (v6.7, 3 weeks ago):** Introduced integer computation for Base N mode and added a backward compatibility toggle. ## App Momentum (Maintenance) {#momentum} - Ships maintenance-only updates. - Enforced integer computation in latest release. > **Cadence:** 1 total versions · 1 majors in last 6 months · 26 days since last update ## The "So What?" (Strategic Takeaway) {#so-what} SFX Scientific Calculator is an utilities app that is completely free. It holds a 4.66/5 rating from 144 reviews. > **Bottom Line:** SFX Scientific Calculator provides a reliable, specialized tool for engineering workflows, but the lack of a monetization model risks stagnation against better-funded rivals. **Best for:** Students and engineers requiring a handheld-style scientific calculator for coursework, laboratory work, and technical calculations. ### PM Action Plan (Next Best Moves) - [ ] [INVEST] Introduce a Pro-tier for cloud-sync and advanced formula storage because the current free-only model limits development resources → increase long-term sustainability ### Outlook: Stable The scientific calculator market is consolidating around tools that offer either deep integration or aggressive live-ops, leaving SFX Scientific Calculator in a stable but vulnerable position. Without a clear path to monetization, the app will likely remain a niche tool, unable to scale its feature set to match the rapid update cycles of larger competitors. - ⚪ The maintenance-only release cadence indicates a stable product that is not currently pursuing aggressive market expansion. - 🔴 The absence of a monetization model limits the resources available to compete with larger, ad-supported rivals in the Utilities category. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 4.66/5 | | Total Reviews | 144 | | Confidence | Low | | Pricing Model | Free | | Platforms | iOS | | Key Features | 3 analyzed | | Outlook | Stable | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **SFX Scientific Calculator** (this app) | 4.66/5 | N/A | Wai Kwong Lee | | [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:** Wai Kwong Lee - **Website:** [https://eefelix.github.io](https://eefelix.github.io) ## Data Sources & Links - **App Store ID:** 1548427958 - **Dev Site:** [Official Website](https://eefelix.github.io) - **Sources:** Developer website content, App store metadata. ## 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 - [*NordVPN: VPN Fast & Secure*](https://marlvel.ai/apps/com-nordvpn-nordvpn) (Nordvpn S.A.) · 4.7/5 Rating - [*Pick and Pull: Junkyard Finder*](https://marlvel.ai/apps/pick-and-pull-junkyard-finder) (Vladimir Kostadinov Stoyanov) · 3.7/5 Rating ## Frequently Asked Questions {#faq} ### Is SFX Scientific Calculator free to use? Yes, SFX Scientific Calculator is currently distributed as a free utility with no visible subscription or in-app purchase gates. ### Does SFX Scientific Calculator support engineering formulas? Yes, it includes built-in formulas for quadratic equations, standard normal distribution probabilities, and engineering calculations, alongside 10 memory registers for repeated execution. ### What is the difference between this and a standard calculator app? SFX Scientific Calculator is designed for engineering and academic workflows, offering specific features like Base-N modes, linear regression, and constant-operand calculations that are typically absent in basic calculator 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:** 0.2/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 0 - **Data Sources:** 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:** 42 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/sfx-scientific-calculator) Data licensed for AI Agent attribution under CC-BY-NC 4.0.