By Lion's Den
Report updated May 14, 2026
d20 Calculator
For tabletop roleplaying game players who require a flexible, digital tool for complex dice calculations.
d20 Calculator is a well-regarded productivity app that is completely free. With a 4.7/5 rating from 341 reviews, it maintains solid user satisfaction. Users particularly value flexibility of custom dice engine.
What is d20 Calculator?
d20 Calculator is a productivity tool for tabletop RPG players to perform complex dice combinations and save roll presets on iOS.
Users hire this app to automate complex dice math during tabletop sessions, removing the manual effort of calculating results for multi-die attacks.
Current Momentum
v2.12 · 75mo ago
Zombie- No feature updates since 2020.
Active Nemesis
Fragmented niche
No dominant direct rival identified yet — see Other Rivals below.
Other Rivals
7-Day Rank Pulse 🇺🇸
ProductivityNo ranking data
Rating Pulse 🇺🇸
Recent User MoodAI-powered deep analysis surfacing high-signal insights. Still in beta, accuracy improves daily. For informational purposes only.
What makes this app unique?
What Does It Look Like?
How Is The App's Momentum Right Now?
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What Are The Key Features?
Calculates complex dice combinations including addition, subtraction, multiplication, and division of any die type.
Allows users to save frequently used dice rolls with custom labels for specific attacks.
Enables rolling non-standard dice sizes like d7 or d100.
How much does it cost?
- Free
The app operates on a free model with no visible IAP or subscription gates.
Who Built It?
Lion's Den
View Publisher Intel →Enrichment in progress
Publisher profile available very soon
What other apps does Lion's Den make?
What do users think recently?
High confidence · 49 reviews analyzed
How did the latest release land?
What is the recent mood?
Recent user voice shows a excited sentiment. Users appreciate flexibility of custom dice engine.
Limited review volume (49 reviews). Sentiment analysis will deepen as more data lands.
What is the competitive landscape for d20 Calculator?
How's The Productivity Market?
**Pricing Strategy**: Free model with no IAP or subscription gates, prioritizing user acquisition over direct monetization. **Target Audience**: Tabletop roleplaying game players requiring digital tools for complex dice math.
The rivals identified
Peers
Maintains a massive user base with over 21,000 ratings, establishing strong social proof and category dominance.
Implements a dice-locking feature that allows users to keep specific results while re-rolling others during play.
Provides visual score graph analytics which helps players track performance trends over multiple game sessions.
Features an integrated game timer, a critical utility missing from our current dice-focused calculator toolset.
Offers a comprehensive customization suite for unlimited players that exceeds our current label-saving functionality.
Includes integrated game notes, allowing users to document session-specific rules or narrative developments during play.
My Board Game Collection
★4.4 (961)Tommy Uytterhaegen
This app captures the same tabletop gaming audience by providing organizational tools for the physical game library.
Leverages extensive database integration to automate game cataloging, creating a high barrier to user churn.
Includes automated translation features that support a global user base, significantly expanding their potential market reach.
New Kids on the Block
Prioritizes a paperless score tracking experience that simplifies the transition from physical to digital game management.
Focuses on specialized livestock and PAR level calculations, demonstrating a highly verticalized approach to utility apps.
The outtake for d20 Calculator
Strengths to defend, gaps to attack
Core Strengths
- High 4.67 rating sustains organic install velocity
- Flexible calculation engine addresses complex RPG math
Critical Frictions
- No feature updates since 2020
- Lacks integrated game-state tracking
Growth Levers
- Integration of game timers for session management
- Adding visual analytics for performance trends
Market Threats
- Competitors with active 2-week update cadences
- Integrated game-state tools rendering static calculators obsolete
What are the next best moves?
Audit competitive feature set because rivals like ScorePal offer game timers → retain utility-seeking users
Competitors are adding session-management tools that directly address the broader tabletop workflow.
Trade-off: Pause the UI theme expansion — functional utility has higher retention impact than visual variety.
A counter-intuitive read
The app's lack of updates is not just a maintenance failure, but a strategic risk because tabletop players are shifting from static calculators to integrated game-management platforms.
Feature Gaps vs Competitors
- Integrated game timer (available in ScorePal)
- Visual score graph analytics (available in ScorePal)
- Integrated game notes (available in Skorer)
Key Takeaways
- The app's core utility is stable, but the lack of updates since 2020 is a critical churn risk.
- Competitors are moving toward integrated game management, which threatens to relegate simple calculators to a secondary tool status.
d20 Calculator holds a strong baseline rating, but the lack of updates since 2020 leaves it vulnerable to rivals with integrated game-state tools, so the PM should prioritize adding session-management features to defend against churn.
Where Is It Heading?
Declining
The tabletop utility market is consolidating around apps that provide integrated game-state tracking, leaving static calculators like d20 Calculator exposed. The PM must transition from maintenance to active development to prevent further erosion of the user base to feature-rich rivals.
The lack of updates since 2020 signals a shift to maintenance mode, which invites competitors to capture the active user base.