Solid but not perfect
If you don’t intend a Tucker’s Kobolds or a lot of time at lower level, it probably won’t affect you.

Archived App (Last seen on 5 May 2026)
This is an archived listing of the app previously available on the App Store.This app simplifies the process of creating balanced encounters for tabletop role-playing games. It calculates appropriate challenge ratings based on party composition and can determine the difficulty of custom encounters with mixed creature types.
1.0
August 1, 2015
This app has been updated by Apple to display the Apple Watch app icon.
Encounter Challenge Calc is a tool designed to help game masters determine the appropriate difficulty for encounters in tabletop role-playing games. It calculates challenge ratings based on your party's levels and composition.
The app takes your party's character levels and number of characters as input. It then provides XP thresholds for easy, medium, hard, and deadly encounters, which form the basis for its calculations.
Yes, the Custom Encounter Difficulty feature allows you to input multiple creatures of varying Challenge Ratings (CR). The app will then calculate the overall difficulty and XP value of that mixed encounter.
This feature provides a quick reference chart showing the maximum number of creatures of a specific CR you can include in an encounter to achieve a desired difficulty level for your party.
Encounter Challenge Calc is a paid app, priced at $0.99. This one-time purchase grants you access to all its features.
Encounter Challenge Calc is available for iPhone, iPad, and iPod. It is designed for iOS devices.
The app has an age rating of 4+, making it suitable for a wide range of users.
The latest version of Encounter Challenge Calc is 1.0, and it was last updated on August 1, 2015. Future updates may be released by the developer.