--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Modulus Calculator" developer_entity: "Theodore Dubois" bundle_id: "com.tbodt.Mod-Calculator" app_store_id: "1432356578" category: "Utilities" primary_platform: "ios" primary_monetization: "Free" offline_capable: false market_region: "US" platforms: "iOS" app_last_updated: "2018-08-26" report_date: "2026-07-05" last_verified: "2026-07-05T00:00:00.000Z" report_version: "1.0" total_reviews: 8 overall_rating: 4.8 confidence: "low" confidence_score: 0.5 data_age_days: 42 momentum_velocity: "zombie" intelligence_version: 12 nemesis: "Calculator for iPad!" competitor_count: 11 tags: ["utilities", "free", "mobile app", "app review", "app analysis", "students", "mathematicians", "requiring"] canonical_url: "https://marlvel.ai/apps/modulus-calculator" license: "CC-BY-NC 4.0" content_version: "v2" --- # Modulus Calculator Intelligence Report ## TL;DR {#tldr} - **Category**: Utilities · Free - **Signal**: Rating 4.75 > **TL;DR:** Modulus Calculator is a utilities app by Theodore Dubois, rated 4.75/5 by 8 users, available on iOS. > > **Marlvel.ai App Intelligence** — Independent analysis. US Market. No publisher influence. > **Key Insight:** Modulus Calculator is a utilities app by Theodore Dubois. ## Quick Facts | Fact | Value | | :--- | :--- | | **Rating** | 4.75/5 (8 reviews) | | **Category** | Utilities | | **Developer** | Theodore Dubois | | **Pricing** | Free | | **Platforms** | iOS | | **Confidence** | Low (0.5/1.0) | | **Data Age** | 42d | ## Metadata & Market Performance - **Publisher:** Theodore Dubois - **Category:** Utilities - **Target Audience:** Students and mathematicians requiring specialized modular arithmetic calculations. - **Platforms:** iOS - **Version Reviewed:** 1.0 - **Report Date:** 2026-07-05 - **Signal Count:** 53 reviews analyzed - **Confidence:** Low (0.5/1.0) - **App Store ID (iOS):** 1432356578 - **Bundle ID:** com.tbodt.Mod-Calculator - **Performance Trend:** Stable - **Data Window:** Analysis based on signals collected up to 2026-07-05 ## Executive Snapshot **What it is:** Modulus Calculator is a utility app for students and mathematicians that performs arithmetic operations within user-defined moduli on iOS. **Why users hire it:** Users hire this app to perform modular arithmetic and modular inverses, a task that standard calculators do not support, to facilitate academic and engineering workflows. ## App DNA (Features & Intent) - **[Differentiator] Modular Arithmetic Operations:** Performs standard calculator operations within a user-defined modulus. - **[Differentiator] Modular Power and Inverse Support:** Calculates powers and modular inverses to facilitate division via multiplication. ## Market Position {#market-position} Modulus Calculator occupies a niche utility segment with a 4.75 rating across 8 reviews. The lack of tablet-specific optimization relative to the nemesis Calculator for iPad! signals a vulnerability in the professional academic segment. ## Monetization Strategy - **Model:** Free - **Tiers:** Free - **Analysis:** The app is distributed as a free utility with no visible subscription or in-app purchase tiers. ## SWOT Analysis {#swot} **Core Strengths:** - Specialized modular arithmetic engine serves a distinct academic niche - Free distribution model removes barriers for student adoption **Growth Levers:** - Tablet-specific UI overhaul could neutralize the nemesis's productivity advantage - Integration of a scratchpad feature would improve the workflow for engineers ## Recent Changes (v11 → v12) {#recent-changes} The analysis shifted focus from the app's maintenance-mode status to the specific competitive risks posed by productivity-focused rivals, refining the PM roadmap to prioritize tablet-specific features. **Overall trend**: Stable **Compared at**: 2026-07-05 ### High-impact changes - **[Shifted] Contrarian Take Pivot** (positioning) ### Medium-impact changes - **[Shifted] SWOT Analysis Re-alignment** (swot) - **[Improved] PM Action Item Justification** (positioning) ## Rivals Landscape {#rivals} > Competitive positioning identified by AI analysis of app features, category, and market signals. ### Modulus Calculator vs Calculator for iPad! - **[Calculator for iPad!](https://marlvel.ai/apps/calculator-for-ipad-1)** by 7th Gear: This app directly competes for the utility-focused user base by offering a comprehensive suite of scientific and high-precision tools that mirror this app's core functionality. - **Key differences:** - Includes a dedicated notes and drawing tab for visual scratchpad calculations during complex math sessions. - Offers advanced visual customization options that allow users to tailor the interface to their specific preferences. - Provides high-precision math capabilities that cater specifically to academic and professional users requiring exact results. ### Contenders (Strong Challengers) - **[Electric Motors Speed Calc](https://marlvel.ai/apps/electric-motors-speed-calc)** by Nitrio: This app competes by offering specialized physics-based calculation engines that serve the professional engineering segment of this app's user base. - Includes a specialized physics engine designed specifically for electric motor speed and performance calculations. - Supports direct result export, facilitating better integration into professional engineering reports and documentation workflows. - **[Triangle Calc A](https://marlvel.ai/apps/com-creamworks-sankakukei)** by kohei yamane: This app competes by specializing in niche geometric problem-solving, capturing a segment of this app's scientific calculator audience. - Provides a dedicated right triangle solver that offers instant output for specific engineering and academic tasks. - Utilizes a minimalist interface design that removes the clutter found in this app's all-in-one utility app. - **[Basic Calculator: Classic Calc](https://marlvel.ai/apps/basic-calculator-classic-calc)** by MobArts: This app targets the same utility-seeking demographic by emphasizing high-precision display and standard memory functions. - Native iPad multitasking support allows users to run the calculator alongside other productivity applications seamlessly. - Focuses on a classic, high-precision display that appeals to users who prefer traditional calculator aesthetics. - **[Dash Calc: Simple Fast Math](https://marlvel.ai/apps/dash-calc-simple-fast-math)** by Enbright LLC: Dash Calc competes by focusing on speed and real-time feedback, targeting users who prioritize efficiency over this app's multi-tool approach. - Delivers live, instant results as the user types, significantly reducing the time required for basic operations. - Features a smart history engine that organizes past calculations more intuitively than this app's standard list. ### Peers (What They Do Better) - **[Unit Converter Pro](https://marlvel.ai/apps/unit-converter-pro)** by Oyku Gul Imran: This app competes by offering a professional-grade conversion experience with advanced input methods. - Supports complex expression input, allowing users to perform calculations directly within the conversion fields. - Enables the creation of custom user-defined units, catering to specialized industries and unique measurement needs. - **[Unit Converter For Engineers](https://marlvel.ai/apps/unit-converter-for-engineers)** by Amanuel Abebaw: This app targets the professional engineering segment of this app's audience with specialized, high-precision conversion tools. - Provides specialized engineering units that are not typically included in general-purpose calculators like this app. - Offers an ad-free interface that provides a cleaner, more professional experience for power users. - **[Quick Unit Converter: All in 1](https://marlvel.ai/apps/quick-unit-converter-all-in-1)** by Moaaz Afzal: This app provides a similar all-in-one conversion experience, directly challenging this app's utility suite. - Features a home screen widget that enables quick conversions without needing to open the main app. - Supports multi-category conversion workflows that streamline the process for users handling complex data sets. - **[Cuspart: Unit Converter](https://marlvel.ai/apps/cuspart-unit-converter)** by Mustafa Tolga DALBUDAK: This app overlaps with this app's unit conversion functionality, serving users who need a dedicated, offline-capable tool. - Offers a robust offline currency converter that functions without requiring an active internet connection. - Allows users to add custom units, providing flexibility that this app's rigid conversion list lacks. ### New Kids on the Block (What's Innovative) - **[Aspect Ratio Pro](https://marlvel.ai/apps/aspect-ratio-pro)** by App ahead GmbH: This app enters the market by focusing on a specific, high-demand calculation task for creative professionals. - Provides a dedicated rule-of-three calculator specifically optimized for aspect ratio and design-related math. - **[Numby Pro](https://marlvel.ai/apps/numby-pro)** by Vivy Technologies: This newcomer disrupts the space by integrating natural language processing to simplify complex calculations. - Uses natural language processing to allow users to input calculations as conversational text queries. ## What's New - **Latest (vVARY, 3 years ago):** General bug fixes. ## App Momentum (Zombie) {#momentum} - Maintains niche utility focus. - Stable 4.75 rating. > **Cadence:** 2 total versions · 0 majors in last 6 months · 1198 days since last update · 1670 days avg between updates ## The "So What?" (Strategic Takeaway) {#so-what} Modulus Calculator is an established utilities app that is completely free. It holds a 4.75/5 rating from 8 reviews. > **Bottom Line:** Modulus Calculator serves a specific academic niche well, but the lack of tablet-optimized features limits its utility for power users, so the PM should prioritize a tablet-specific UI overhaul to defend against productivity-focused rivals. **Best for:** Students and mathematicians requiring specialized modular arithmetic calculations. ### PM Action Plan (Next Best Moves) - [ ] [INVEST] Ship tablet-optimized UI because the nemesis utilizes screen real estate better → increase session duration ### Feature Gaps vs Competitors - Integrated scratchpad (available in Calculator for iPad! but missing here) ### Outlook: Stable The market for academic utility apps is consolidating around tools that offer integrated workflows, such as scratchpads and multi-tool suites. Modulus Calculator remains stable but faces long-term churn risk if it does not evolve beyond its mobile-first, single-function design to meet the productivity needs of students and engineers. - ⚪ The app maintains a high rating with a niche user base, indicating stable demand for specialized modular arithmetic tools. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 4.75/5 | | Total Reviews | 8 | | Confidence | Low | | Pricing Model | Free | | Platforms | iOS | | Key Features | 2 analyzed | | Trend | Stable | | Outlook | Stable | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Modulus Calculator** (this app) | 4.75/5 | N/A | Theodore Dubois | | [Triangle Calc A](https://marlvel.ai/apps/com-creamworks-sankakukei) | N/A/5 | N/A | kohei yamane | | [Dash Calc: Simple Fast Math](https://marlvel.ai/apps/dash-calc-simple-fast-math) | 5.0/5 | Thrilled | Enbright LLC | | [Electric Motors Speed Calc](https://marlvel.ai/apps/electric-motors-speed-calc) | 4.0/5 | Thrilled | Nitrio | | [Numby Pro](https://marlvel.ai/apps/numby-pro) | N/A/5 | N/A | Vivy Technologies | | [Basic Calculator: Classic Calc](https://marlvel.ai/apps/basic-calculator-classic-calc) | 4.8/5 | N/A | MobArts | ## Company Profile - **Developer:** Theodore Dubois - **Website:** [https://www.xiaomi.com](https://www.xiaomi.com) - **Social:** [Instagram](https://www.instagram.com/xiaomi.northamerica) · [Facebook](https://www.facebook.com/XiaomiSupportGlobal) · [X/Twitter](https://twitter.com/xiaomisupport) · [YouTube](https://www.youtube.com/channel/UCR59Xjv9bcmjeeUuUZn7dkg) · [TikTok](https://www.tiktok.com/@xiaomi.northamerica) · [LinkedIn](https://www.linkedin.com/company/xiaomi-technology) ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/modulus-calculator/id1432356578?uo=4) - **Dev Site:** [Official Website](https://www.xiaomi.com) - **Sources:** Developer website content, About us / company information, App store metadata. ## Related Intel Reports - [*Triangle Calc A*](https://marlvel.ai/apps/com-creamworks-sankakukei) (kohei yamane) · N/A Rating - [*Dash Calc: Simple Fast Math*](https://marlvel.ai/apps/dash-calc-simple-fast-math) (Enbright LLC) · 5.0/5 Rating | Excellent Sentiment - [*Electric Motors Speed Calc*](https://marlvel.ai/apps/electric-motors-speed-calc) (Nitrio) · 4.0/5 Rating | Excellent Sentiment - [*Numby Pro*](https://marlvel.ai/apps/numby-pro) (Vivy Technologies) · N/A Rating - [*Basic Calculator: Classic Calc*](https://marlvel.ai/apps/basic-calculator-classic-calc) (MobArts) · 4.8/5 Rating - [*Aspect Ratio Pro*](https://marlvel.ai/apps/aspect-ratio-pro) (App ahead GmbH) · 4.0/5 Rating - [*Unit Converter For Engineers*](https://marlvel.ai/apps/unit-converter-for-engineers) (Amanuel Abebaw) · 5.0/5 Rating - [*Quick Unit Converter: All in 1*](https://marlvel.ai/apps/quick-unit-converter-all-in-1) (Moaaz Afzal) · 5.0/5 Rating - [*Unit Converter Pro*](https://marlvel.ai/apps/unit-converter-pro) (Oyku Gul Imran) · 4.7/5 Rating | Excellent Sentiment - [*Cuspart: Unit Converter*](https://marlvel.ai/apps/cuspart-unit-converter) (Mustafa Tolga DALBUDAK) · 4.5/5 Rating | Positive Sentiment ## 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:** 53 - **Data Sources:** 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:** 42 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/modulus-calculator) Data licensed for AI Agent attribution under CC-BY-NC 4.0.