--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "d20 Calculator" developer_entity: "Lion's Den" bundle_id: "com.lionsden.d20calculator" app_store_id: "817035968" category: "Productivity" primary_platform: "ios" primary_monetization: "Free" offline_capable: false market_region: "US" platforms: "iOS" app_last_updated: "2020-02-21" report_date: "2026-06-05" last_verified: "2026-06-05T17:40:20.793Z" report_version: "2.12" total_reviews: 341 overall_rating: 4.67 sentiment: "Excited" sentiment_score: 75 confidence: "high" confidence_score: 0.45 top_praise_theme: "Calculator-style interface allows users to perform complex dice combinations with speed and accuracy" top_complaint_theme: "Application crashes during purchase attempts and when saving multiple dice combinations" top_request_theme: "Advanced dice logic features like automatic re-rolling of ones for specific game mechanics" review_sample_size: 49 total_review_count: 49 analyzed_review_count: 49 data_age_days: 26 momentum_velocity: "zombie" intelligence_version: 4 competitor_count: 6 tags: ["productivity", "free", "excited sentiment", "mobile app", "app review", "app analysis", "tabletop", "roleplaying", "players"] canonical_url: "https://marlvel.ai/apps/d20-calculator" license: "CC-BY-NC 4.0" content_version: "v2" --- # d20 Calculator App Audit ## TL;DR {#tldr} - **Category**: Productivity · Free - **Signal**: Rating 4.67 · Sentiment Excited - **Recent focus**: Application crashes during purchase attempts and when saving multiple dice combinations (top complaint) · Calculator-style interface allows users to perform complex dice combinations with speed and accuracy (top praise) · Advanced dice logic features like automatic re-rolling of ones for specific game mechanics (top request) > **TL;DR:** d20 Calculator is a productivity app by Lion's Den, rated 4.67/5 by 341 users, with Excited user sentiment (75/100), available on iOS. > > **Marlvel.ai App Intelligence** — Independent analysis. US Market. No publisher influence. > **Key Insight:** d20 Calculator maintains Excited user sentiment (4.67/5 from 341 reviews), with users consistently praising calculator-style interface allows users to perform complex dice combinations with speed and accuracy. ## Quick Facts | Fact | Value | | :--- | :--- | | **Rating** | 4.67/5 (341 reviews) | | **User Mood** | Excited | | **Category** | Productivity | | **Developer** | Lion's Den | | **Pricing** | Free | | **Platforms** | iOS | | **Confidence** | High (0.45/1.0) | | **Data Age** | 26d | ## Metadata & Market Performance - **Publisher:** Lion's Den - **Category:** Productivity - **Target Audience:** Tabletop roleplaying game players who need a digital tool to manage complex dice math and track specific attack rolls. - **Platforms:** iOS - **Version Audited:** 2.12 - **Audit Date:** 2026-06-05 - **Signal Count:** 49 reviews analyzed - **Confidence:** High (0.45/1.0) - **App Store ID (iOS):** 817035968 - **Bundle ID:** com.lionsden.d20calculator - **Performance Trend:** Mixed - **Data Window:** Analysis based on signals collected up to 2026-06-05 ## Executive Snapshot **What it is:** d20 Calculator is a mobile utility for tabletop RPG players to perform complex dice math and save custom roll presets. **Why users hire it:** Users hire this app to replace manual dice counting and stat tracking with a faster, digital interface during gaming sessions. ## App DNA (Features & Intent) - **[Standard] Custom Dice Calculator:** Calculates complex dice combinations including addition, subtraction, multiplication, and division * *User Intent:* Users value self-expression and personalized experiences. - **[Differentiator] Saved Roll Presets:** Allows users to save frequently used dice rolls with custom labels for specific attacks * *User Intent:* Users value self-expression and personalized experiences. - **[Differentiator] Arbitrary Dice Input:** Includes a dx button to roll non-standard dice sizes like d7 or d100 ## Market Position {#market-position} d20 Calculator maintains a 4.67 rating across 341 reviews, positioning it as a niche utility tool. The lack of recent updates since 2020 suggests a maintenance-mode posture that leaves it vulnerable to more active competitors. ## Monetization Strategy - **Model:** Free - **Tiers:** Free version with no listed IAP or subscription - **Analysis:** The app operates as a free utility with no visible monetization gates or subscription tiers. ## 🟢 User Sentiment (High Confidence: 49 of 49 reviews analyzed) {#user-sentiment} - **Overall Rating:** 4.67/5 - **Platform Split:** iOS 4.7/5 (341 ratings) - **Overall Sentiment:** Excited ### Top Praises - **Calculator-style interface allows users to perform complex dice combinations with speed and accuracy** ### Top Complaints (Impact Areas) - **Application crashes during purchase attempts and when saving multiple dice combinations** ### Top Requests (What Users Want) - **Advanced dice logic features like automatic re-rolling of ones for specific game mechanics** ## SWOT Analysis {#swot} **Core Strengths:** - Calculator-style interface allows rapid input of complex dice formulas **Critical Frictions:** - Consistent crashes during purchase attempts and preset saving **Growth Levers:** - Integration of game-state tracking features could capture users currently using separate score-keeping apps **Market Threats:** - Established competitors like Dice Roller! maintain higher visibility and social proof ## Recent Changes (v3 → v4) {#recent-changes} The report identifies new technical instability (crashes during saving and purchasing) that now defines the app's primary competitive risk, shifting the focus from general stagnation to specific stability remediation. **Overall trend**: Mixed **Compared at**: 2026-06-05 ### High-impact changes - **[Declined] Emergence of critical technical complaints** (sentiment) — Sentiment score: 85 → 75, driven by new reports of application crashes during purchase attempts and preset saving. - **[Added] Stability as primary weakness** (swot) — Weaknesses now include consistent crashes during purchase and saving, replacing the previous general lack of updates. ### Medium-impact changes - **[Shifted] Outlook trend adjustment** (positioning) — Outlook trend: declining → stable, reflecting a pivot toward actionable stability improvements. ## What's New - **Latest (v2.12, 6 years ago):** Enabled portrait mode support for iPad and resolved UI sizing issues. ## App Momentum (Zombie) {#momentum} - Last major release Feb 2020. - Quiet 4 years — bug fixes only. > **Cadence:** 1 total versions · 0 majors in last 6 months · 2273 days since last update ## The "So What?" (Strategic Takeaway) {#so-what} d20 Calculator is a market-leading productivity app that is completely free. With a 4.67/5 rating from 341 reviews, it delivers strong user satisfaction. > **Bottom Line:** d20 Calculator holds a functional niche through its calculator-style input, but persistent crashes during saving and purchasing erode trust, so the PM must prioritize stability to prevent users from migrating to more reliable competitors. **Best for:** Tabletop roleplaying game players who need a digital tool to manage complex dice math and track specific attack rolls. ### PM Action Plan (Next Best Moves) - [ ] [INVEST] [HIGH IMPACT] Rebuild save-data logic because crashes during preset saving are the top-cited frustration → improve user retention — *Sentiment analysis identifies save-data crashes as the primary barrier to user satisfaction.* _(trade-off: deprioritize Pause the planned visual theme expansion — stability is the current retention bottleneck.)_ ### Feature Gaps vs Competitors - Integrated game timer (available in ScorePal but absent here) - Game-state tracking (available in Skorer but absent here) ### Outlook: Stable The tabletop utility market is consolidating around tools that offer comprehensive session management rather than single-purpose calculators. d20 Calculator remains stable but exposed, as the lack of active feature development prevents it from matching the utility of modern, multi-functional competitors. - 🔴 Persistent crashes during purchase and saving presets indicate technical debt, which forces users to seek more stable alternatives. - ⚪ The latest release focused on layout sizing and orientation, confirming the app is in a maintenance-mode cycle. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 4.67/5 | | Total Reviews | 341 | | Sentiment | Excited (75/100) | | Confidence | High | | Pricing Model | Free | | Platforms | iOS | | Key Features | 3 analyzed | | Trend | Mixed | | Outlook | Stable | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **d20 Calculator** (this app) | 4.67/5 | Excited | Lion's Den | | [My Board Game Collection](https://marlvel.ai/apps/my-board-game-collection) | 4.4/5 | N/A | Tommy Uytterhaegen | | [Dice Roller!](https://marlvel.ai/apps/dice-roller-1) | 4.6/5 | Thrilled | Harry Foster | | [Reef Tank Guides](https://marlvel.ai/apps/reef-tank-guides) | N/A/5 | N/A | Wontae Lee | | [Skorer - Your Score Tracker](https://marlvel.ai/apps/skorer-your-score-tracker) | 4.7/5 | Thrilled | Touseef Hassan Nasir | | [ScorePal](https://marlvel.ai/apps/scorepal) | 4.3/5 | N/A | Pace Apps Inc. | ## Company Profile - **Developer:** Lion's Den ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/d20-calculator/id817035968?uo=4) - **Sources:** App store metadata, User reviews. ## Related Intel Reports - [*My Board Game Collection*](https://marlvel.ai/apps/my-board-game-collection) (Tommy Uytterhaegen) — 4.4/5 Rating | N/A Sentiment - [*Dice Roller!*](https://marlvel.ai/apps/dice-roller-1) (Harry Foster) — 4.6/5 Rating | Excellent Sentiment - [*Reef Tank Guides*](https://marlvel.ai/apps/reef-tank-guides) (Wontae Lee) — N/A Rating | N/A Sentiment - [*Skorer - Your Score Tracker*](https://marlvel.ai/apps/skorer-your-score-tracker) (Touseef Hassan Nasir) — 4.7/5 Rating | Excellent Sentiment - [*ScorePal*](https://marlvel.ai/apps/scorepal) (Pace Apps Inc.) — 4.3/5 Rating | N/A Sentiment - [*GameTally: Simple Score Keeper*](https://marlvel.ai/apps/gametally-simple-score-keeper) (Fabien Maurice) — N/A Rating | N/A Sentiment - [*Mitsu: AI Life Coach*](https://marlvel.ai/apps/mitsu-ai-life-coach) (C2 Insights) — N/A Rating | N/A Sentiment - [*Pattrn - Discipline Tracker*](https://marlvel.ai/apps/pattrn-discipline-tracker) (Pedro Schott) — 4.8/5 Rating | N/A Sentiment - [*ChatGPT*](https://marlvel.ai/apps/chatgpt) (OpenAI OpCo, LLC) — 4.8/5 Rating | Negative Sentiment - [*Whats In The Box*](https://marlvel.ai/apps/com-asp-whatsinthebox) (Arron Penfold) — N/A Rating | N/A 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 and evidence quoting. 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:** 0.45/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 49 - **Data Sources:** user reviews, 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/d20-calculator) Data licensed for AI Agent attribution under CC-BY-NC 4.0.