Report updated Jun 5, 2026
d20 Calculator
For tabletop roleplaying game players who need a digital tool to manage complex dice math and track specific attack rolls.
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 appreciate calculator-style interface allows users to perform complex dice combinations with speed and accuracy, though application crashes during purchase attempts and when saving multiple dice combinations remains a common concern.
What is d20 Calculator?
d20 Calculator is a mobile utility for tabletop RPG players to perform complex dice math and save custom roll presets.
Users hire this app to replace manual dice counting and stat tracking with a faster, digital interface during gaming sessions.
Current Momentum
v2.12 · 75mo ago
Zombie- Last major release Feb 2020.
- Quiet 4 years — bug fixes only.
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 Mood
What makes this app unique?
What Does It Look Like?
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What Are The Key Features?
Calculates complex dice combinations including addition, subtraction, multiplication, and division
Allows users to save frequently used dice rolls with custom labels for specific attacks
Includes a dx button to roll non-standard dice sizes like d7 or d100
How much does it cost?
- Free version with no listed IAP or subscription
The app operates as a free utility with no visible monetization gates or subscription tiers.
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 calculator-style interface allows users to perform complex dice combinations with speed and accuracy, but report application crashes during purchase attempts and when saving multiple dice combinations.
Limited review volume (49 reviews). Sentiment analysis will deepen as more data lands.
View the full user-sentiment analysis
Mood gauge, ratings & review-volume history, every praise / complaint / request, and sentiment over time.
What is the competitive landscape for d20 Calculator?
Where is it available?
Localized markets (1)
How's The Productivity Market?
Market outlook for this category
Available very soon
The rivals identified
Same space(4)
Skorer competes by serving the broader tabletop ecosystem, capturing users who need to track game progress alongside their dice rolls.
Differentiators
- 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.
ScorePal overlaps with our utility-focused user base by providing specialized tools for managing game state and scoring.
Differentiators
- 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.
This app captures the same tabletop gaming audience by providing organizational tools for the physical game library.
Differentiators
- 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.
As a direct functional alternative, this app competes for the same core use case of simulating dice rolls for tabletop games.
Differentiators
- 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.
New entrants(2)
While in a different niche, this app competes for the same 'Productivity' category attention and utility-seeking user demographic.
Differentiators
- Focuses on specialized livestock and PAR level calculations, demonstrating a highly verticalized approach to utility apps.
This newcomer targets the same tabletop gaming market by focusing on the essential utility of score persistence.
Differentiators
- Prioritizes a paperless score tracking experience that simplifies the transition from physical to digital game management.
Compare d20 Calculator against every rival
All rivals in one side-by-side table — identity, store metrics, ratings & sentiment, and strategic intel — plus a head-to-head page for each.
The outtake for d20 Calculator
Strengths to defend, gaps to attack
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
What are the next best moves?
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: Pause the planned visual theme expansion — stability is the current retention bottleneck.
A counter-intuitive read
The app's lack of monetization is a competitive weakness, as it prevents the developer from funding the stability improvements required to compete with ad-supported rivals.
Feature Gaps vs Competitors
- Integrated game timer (available in ScorePal but absent here)
- Game-state tracking (available in Skorer but absent here)
Key Takeaways
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.
Where Is It Heading?
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.