Diceriffic
Diceriffic is a polyhedral dice rolling app built to function like a simple calculator. You both roll and build up your dice “equation” simultaneously by tapping the appropriate buttons.
Installation
Get Diceriffic on Google Play.
Usage
Basics
Tap a die button (+dX) to roll a die with X sides. Every time you tap a die button another die will be rolled and added to your running total.
Example: If you wanted to roll 4d6, simply tap (+d6) four times.
Constant Modifiers
Tap the modifier button (+1) to add a constant +1 modifier to your dice roll. To get a larger modifier, simply keep tapping (+1).
Example: If you wanted to add +4, simply tap (+1) four times.
Sign Change
If you want to subtract a die or modifier (rather than add it), you can tap the sign button (+/−) to switch the sign before tapping the die or modifier button.
Re-rolling
You can tap the reroll button (⟳) to re-roll the dice you’ve previously selected.
Clearing
Tap the clear button (C) to clear your rolls and start over.
Deleting
Tap the delete button (⌫) to remove the last part of the dice equation.
Example: You tapped (+d10) then (+d20) (+d20), giving you 1d10 + 1d20. Tapping (⌫) will delete the 2d20.
Other Operators
Diceriffic contains 5 other operators that can be added to a roll of dice.
Explode
Tapping the explode button (!/!!) to make dice rolls “explode”, i.e., when the highest number possible is rolled, the die gets rolled again.
Example: You tapped 4x (+d6) and (!), for an equation of 4d6! and the rolls [4,(6,5),3,(6,4)]. The original four rolls were 4, 6, 3, and 6. For each 6, the die was rolled again (grouped in the parentheses) for an extra 5 and 4, for a total of 28.
Tapping the explode button more than once will toggle the equation between normal explodes ! and “compound explodes” !!, where grouped dice are added together into a single result.
Example: You tapped 4x (+d6) and 2x (!), for an equation of 4d6!! and the rolls [4,(11),3,(10)]. The original four rolls were 4, 6, 3, and 6. For each 6, the die was rolled again (grouped in the parentheses) for an extra 5 and 4, and those groups were subtotaled into 11 and 10. The overall total remains 28.
Keep Highest
Tapping the keep highest button (kh) will keep the highest remaining roll, discarding the others. You may keep tapping the keep highest button to keep more of the original results.
Example: You tapped 4x (+d6) and (kh), for an equation of 4d6kh1 and the rolls [1,4,5,3]. Since 5 was the highest roll, the total will be 5. If you tap keep highest again, you’ll change the equation to 4d6kh2 and increase the total to 9 as now both the 5 and 4 rolls are being kept.
Keep Lowest
Tapping the keep lowest button (kl) will keep the lowest remaining roll, discarding the others. You may keep tapping the keep lowest button to keep more of the original results.
Example: You tapped 4x (+d6) and (kl), for an equation of 4d6kl1 and the rolls [1,4,5,3]. Since 1 was the lowest roll, the total will be 1. If you tap keep lowest again, you’ll change the equation to 4d6kl2 and increase the total to 4 as now both the 1 and 3 rolls are being kept.
Drop Highest
Tapping the drop highest button (dh) will drop the highest remaining roll, keeping the others. You may keep tapping the drop highest button to drop more of the original results.
Example: You tapped 4x (+d6) and (dh), for an equation of 4d6dh1 and the rolls [1,4,5,3]. Since 5 was the highest roll, the total will be reduced from 13 to 8. If you tap drop highest again, you’ll change the equation to 4d6dh2 and decrease the total further to 4 as now both the 5 and 4 rolls are being dropped.
Drop Lowest
Tapping the drop lowest button (dl) will drop the lowest remaining roll, keeping the others. You may keep tapping the drop lowest button to drop more of the original results.
Example: You tapped 4x (+d6) and (dl), for an equation of 4d6dl1 and the rolls [1,4,5,3]. Since 1 was the highest roll, the total will be reduced from 13 to 12. If you tap drop lowest again, you’ll change the equation to 4d6dl2 and decrease the total further to 9 as now both the 1 and 3 rolls are being dropped.
Count Target GTE
Tapping the target gte button (≥) will, instead of adding the rolls, count the rolls greater than or equal to the target number. You may keep tapping the target gte button to increase the target.
Example: You tapped 4x (+d6) and (≥), for an equation of 4d6≥1 and the rolls [1,4,5,3]. Since all four rolls are greater than or equal to 1, the total will 4. If you tap target gte again, you’ll change the equation to 4d6≥2 and decrease the total to 3 as now only three rolls are greater than or equal to 2.
Note: When counting targets, any constant modifier will be added to each roll before counting, rather than only once to the final total.
Count Target LTE
Tapping the target lte button (≤) will, instead of adding the rolls, count the rolls less than or equal to the target number. You may keep tapping the target lte button to increase the target.
Example: You tapped 4x (+d6) and (≤), for an equation of 4d6≤1 and the rolls [1,4,5,3]. Since only one roll is less than or equal to 1, the total will 1. If you tap target lte again twice, you’ll change the equation to 4d6≤3 and increase the total to 2 as now there are two rolls less than or equal to 3.
Note: When counting targets, any constant modifier will be added to each roll before counting, rather than only once to the final total.
Errata
Diceriffic is open-source under the MIT license. Source available at https://github.com/jonthysell/Diceriffic.
Copyright (c) 2024-25 Jon Thysell