DiceOdds View on the App Store
DiceOdds のアイコン

DiceOdds: RPG Dice Calculator

Exact odds, advantage, damage

Stop guessing your rolls. DiceOdds computes the exact probability of any dice expression, with advantage, keep and drop, success pools and expected damage. Fully offline.

Download on the App Store

A one-time purchase. No subscription.

DiceOdds screen

What it does

EXACT MATH, NOT SIMULATION

Every result is computed exactly, not estimated from random samples. The numbers are the true probabilities.

BUILT FOR REAL TABLETOP ROLLS

Standard notation like 3d6+2, 2d20, 1d8+1d6+3 Advantage and disadvantage Keep and drop the highest or lowest dice (great for ability scores) Success pools: count how many dice beat a target number Expected damage per attack, including critical hits

SEE THE WHOLE PICTURE

A clear distribution chart shows how likely every outcome is, plus an "at least / at most" table for the chance to beat a difficulty class or armor.

QUICK COMMON ROLLS

One tap for the rolls you use most, and save your own expressions for next session.

PRIVATE AND OFFLINE

No sign-in, no ads, no tracking, no network access. Everything runs on your device. One simple purchase. No subscriptions.

Screens

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Details

DiceOdds is a probability calculator for tabletop role-playing and board games. It does not roll dice for you — it tells you the exact odds before you roll, so you can plan the smart play.

Type any dice expression and instantly see the full distribution, the mean, the range, and the chance of hitting any target number.

EXACT MATH, NOT SIMULATION

Every result is computed exactly, not estimated from random samples. The numbers are the true probabilities.

BUILT FOR REAL TABLETOP ROLLS

  • Standard notation like 3d6+2, 2d20, 1d8+1d6+3
  • Advantage and disadvantage
  • Keep and drop the highest or lowest dice (great for ability scores)
  • Success pools: count how many dice beat a target number
  • Expected damage per attack, including critical hits

SEE THE WHOLE PICTURE

A clear distribution chart shows how likely every outcome is, plus an "at least / at most" table for the chance to beat a difficulty class or armor.

QUICK COMMON ROLLS

One tap for the rolls you use most, and save your own expressions for next session.

PRIVATE AND OFFLINE

No sign-in, no ads, no tracking, no network access. Everything runs on your device.

One simple purchase. No subscriptions.

FAQ

How much does it cost?

A one-time purchase. No subscription.

Where is my data stored?

Only on your iPhone. No account and no sign-in required.

Which devices are supported?

iPhone, from the App Store.

How do I get in touch?

Email suportapps44@gmail.com.

Try DiceOdds

A one-time purchase. No subscription.

Download on the App Store
ttrpg tabletop probability d20 d100 pool roll chance distribution statistics gamemaster boardgame