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RANDSUMapp

RANDSUM app

A dice roller for your home screen

Any notation, every step shown, and your last rolls kept. Install it on your phone and it rolls offline, no account and no network.

Open the appNotation guide
4d6L    → 14   [6, 5, 3] dropped 1
1d20+5  → 17
2d8!    → 11   exploded on 8

Built for the table

One screen: the roll you are building, its result step by step, and your last rolls.

The Roller on a phone in dark mode, showing a 4d6L roll and its steps
The Roller on a phone in light mode, with the dice keys and recent rolls

What it does

  • Any dice notation

    Type 4d6L, 1d20+5, 2d8!, 4dF or anything else in RANDSUM notation, and the roller checks it as you type.

  • Or just tap the dice

    Dice keys build the roll for you: tap d20 twice for 2d20, then add a bonus, drop the lowest or explode.

  • Every step shown

    See each die, what was rerolled, dropped or exploded, and how the total was reached.

  • Your recent rolls

    The last rolls stay beside the roller, so you can check what you rolled or roll it again.

  • Rolls offline

    Install it to your home screen and it keeps rolling at the table with no signal.

  • No account, no tracking

    Nothing to sign up for. History stays on your device, and the app is free and open source.

Install it

The Roller is a web app. Install it once and it opens like any other app, offline too.

  1. iPhone and iPad

    Open the app in Safari, tap Share, then Add to Home Screen.

  2. Android

    Open the app in Chrome and tap Install app in its header, or Install app in the browser menu.

  3. Desktop

    In Chrome or Edge, click the install icon at the end of the address bar.

Powered by the RANDSUM roller

The app rolls with @randsum/roller, the same engine behind the API, the Discord bot and the plugin, so a roll means the same thing everywhere.

Learn the notationAbout the roller

Start rolling

Free, in your browser, at app.randsum.dev. randsum.io gets you there too.

Open the app