Best D20 Calculator Apps & Games

249+ iOS apps & games curated and reviewed

3.7 avg rating
19 free apps & games
Updated September 2026

Whether you're new to d20 calculator or looking for an upgrade, our curated collection of 249+ iOS apps and games has something for everyone. Each app is reviewed and rated by real users, helping you make an informed decision.

Compare top D20 Calculator Apps & Games (September 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1d20 Calculatord20 CalculatorFree4.7★ (342)NoYesSep 2026
2Calculator‰Calculator‰Free4.9★ (409K)YesNoSep 2026
3D20 Attack! for PathfinderD20 Attack! for PathfinderFree2.6★ (18)NoNoMay 2026
4Calculator for iPad!Calculator for iPad!Free4.7★ (61K)NoNoSep 2026
5Dice Pool CalculatorDice Pool CalculatorFreeNoNoAug 2026
6Calculator: Brill CalcCalculator: Brill CalcFreeNoYesJul 2026
7Calculator HD Pro LiteCalculator HD Pro LiteFree4.6★ (51K)YesNoSep 2026
8Calculator :)Calculator :)Free3.0★ (1)NoNoMay 2026

Top Picks for D20 Calculator

d20 Calculator#1

d20 Calculator by Lion's Den

Editor's Choice
📊 Productivity
4.7😊(342 ratings)
FreeIn-App Purchases
d20 Calculator screenshot 1
d20 Calculator screenshot 2
d20 Calculator screenshot 3
d20 Calculator screenshot 4
d20 Calculator screenshot 5

This app is a specialized calculator for tabletop role-playing games. It allows users to input complex dice roll combinations, including additions, subtractions, multiplications, and divisions, and provides instant results. Save custom rolls and enjoy realistic sound effects for an enhanced gaming experience.

What We Love

  • 🚀 Fast and efficient dice rolling
  • 👍 Simple and intuitive interface
  • 💡 Ability to save frequently used dice rolls
  • 🎲 Accurate and balanced random number generation
  • 🔢 Versatile dice calculation capabilities

Room to Improve

  • 🐛 Crashes and stability issues, especially on newer iOS versions
  • 🔒 Inability to restore purchases or remove ads
  • 📱 Lack of support for iPad multitasking features (Split View, Slide Over)
  • 🔍 Limited customization options (e.g., no option to re-roll 1s)
Calculator‰#2

Calculator‰ by Tim O's Studios, LLC

Default Calculator
Strong Contender
🔧 Utilities
4.9😊(409K ratings)
FreeAds
Calculator‰ screenshot 1
Calculator‰ screenshot 2

This utility app offers a clean and intuitive interface for performing calculations. It prioritizes a user-friendly design with large buttons and a clear display for quick and efficient use.

What We Love

  • 👍 Easy to use
  • 👍 Large, clear buttons
  • 👍 Accurate calculations
  • 👍 Simple, no-frills design
  • 👍 Reliable and stable
  • 👍 Helpful for visual impairments

Room to Improve

  • 🔍 Lack of advanced features
  • 💰 Ads can be intrusive
  • 🔒 Concerns about security/malware
  • 🐛 Occasional bugs and glitches
D20 Attack! for Pathfinder#3

D20 Attack! for Pathfinder by Supreme Gravity LLC

Attack + damage roll assistant
Worth Considering
🎮 Games
2.6(18 ratings)
Free
D20 Attack! for Pathfinder screenshot 1
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D20 Attack! for Pathfinder screenshot 4
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D20 Attack! for Pathfinder screenshot 6

This app simplifies Pathfinder combat by automatically calculating attack and damage rolls for your characters. It intelligently adjusts modifiers based on weapons, feats, and conditions, supporting critical hits and iterative attacks. Focus on your adventure, not the math.

More D20 Calculator apps to explore

FAQ about D20 Calculator

What are the best d20 calculator apps & games for iPhone?
d20 Calculator tops our d20 calculator apps & games ranking as of September 2026, with a 4.7-star average from 342 App Store ratings, and it's free to download.
Yes — 19 of the top d20 calculator apps & games we rank are free to download, including d20 Calculator and Calculator‰.
d20 Calculator has no ads and offers in-app purchases, according to its App Store listing as of September 2026.
We track 249+ d20 calculator apps & games on the iOS App Store as of September 2026, ranked by rating, recency, and analysis of real user reviews.
This app functions as a specialized calculator designed for tabletop role-playing games. It allows users to input and calculate the results of various dice roll combinations, including additions, subtractions, multiplications, and divisions, with support for any dice type.
Key features include the ability to calculate complex dice combinations, support for rolling any type of dice (e.g., d7), saving and labeling frequently used rolls, realistic dice roll sound effects, and options for arithmetic operations between dice rolls.