Dice Roller - RPG & D20 Dice

Roll any dice formula in one tap: 4d6 drop lowest, d20 with advantage +5, 8d6, 2d6+1d4+3. Save the rolls you make every game as presets, keep every roll in your history, and check that the dice are fair.

Built for game night
• Tap d4, d6, d8, d10, d12, d20, d100 or a custom die with any number of sides.
• Or type the formula: 4d6dl1, 2d20kh1+5, 3d8-2, d%.
• Advantage and disadvantage for the d20, drop lowest for ability scores, plus or minus modifiers.
• Shake your phone to roll, or tap Roll.
• Dropped dice stay on screen, struck through, so everyone at the table sees the whole roll.
• Natural 20 and natural 1 are marked.

Presets for every character
• Save a formula with a name: Attack d20+7, Fireball 8d6, Stats 4d6 drop lowest.
• Pin up to four presets to the home screen strip and roll them with one tap.
• Add the home-screen widget to open straight into a pinned roll.

Every roll, saved
• Your roll history keeps every roll, with the dice, the total and the time.
• History stays on your phone and is still there after you close the app.

See that the dice are fair
• The fairness screen counts how often each face came up in your own rolls and compares it with the line a fair die would follow.
• A chi-square test gives a plain verdict. Not sure? Roll 10,000 test dice and look at the chart.
• Every roll uses Android's cryptographically secure random generator.

Ads, kept out of the way
Nothing pops up between rolls. A small banner sits at the bottom of the screen. Extra dice colours are optional: they unlock for 24 hours after a short video. Rolling, presets, history and the fairness check never depend on ads.

Rolling works without a connection, needs no account and never asks for your photos, contacts or location. A dice app for tabletop RPGs, board games, classroom games and any game that needs a d20 roller.