Best D20 Calculator Apps & Games

250+ iOS apps & games curated and reviewed

3.9 avg rating
20 free apps & games
Updated November 2026

Whether you're new to d20 calculator or looking for an upgrade, our curated collection of 250+ 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 (November 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1d20 Calculatord20 CalculatorFree4.7★ (342)NoYesNov 2026
2Calculator‰Calculator‰Free4.9★ (410K)YesNoNov 2026
3Calculator for iPad!Calculator for iPad!Free4.7★ (61K)NoNoNov 2026
4D20 Attack! for PathfinderD20 Attack! for PathfinderFree2.6★ (18)NoNoMay 2026
5Dice Pool CalculatorDice Pool CalculatorFree—NoNoAug 2026
6D20 - Dice SimulatorD20 - Dice SimulatorFree5.0★ (20)NoNoMay 2026
7Calculator :)Calculator :)Free3.0★ (1)NoNoNov 2026
8Calculator - Basic & NoAdsCalculator - Basic & NoAdsFree2.0★ (1)NoNoMay 2026

Top Picks for D20 Calculator

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😊(410K 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
Calculator for iPad!#3

Calculator for iPad! by 7th Gear

Basic & Scientific Calculator
Worth Considering
🔧 Utilities
4.7😊(61K ratings)
Free
Calculator for iPad! screenshot 1
Calculator for iPad! screenshot 2
Calculator for iPad! screenshot 3
Calculator for iPad! screenshot 4

This app offers both basic and scientific calculation modes with over 30 scientific operations. It allows for customization of the app's appearance and includes features for note-taking, drawing, and viewing calculation history. It supports high accuracy calculations and nested parentheses.

What We Love

  • 📐 Versatile calculator with basic and scientific modes
  • 📝 Useful note-taking and calculation history features
  • 🎨 Customizable color schemes
  • 💻 Works well on both iPad and iPhone
  • 👍 Easy to use and intuitive interface

Room to Improve

  • 💰 Ads can be intrusive in free version
  • 🔒 Lack of transparency around in-app purchases
  • 🔍 Difficulty finding and accessing premium features
  • 🖥️ Layout issues in split-screen mode
  • 🔢 Inconsistent button placement between portrait and landscape

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 November 2026, with a 4.7-star average from 342 App Store ratings, and it's free to download.
Yes — 20 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 November 2026.
We track 250+ d20 calculator apps & games on the iOS App Store as of November 2026, ranked by rating, recency, and analysis of real user reviews.