Ability & DC Checks

From a message you can trigger an ability check (STR Check, DEX Check, etc.). A small sheet opens with your modifier pre-filled from your character profile — you can edit it, and it stays within the game system's allowed range — plus an Adv / Dis toggle. Tap Roll to roll a d20 (or a second d20 kept best / worst with Adv / Dis).

If the modifier isn't set in your profile, the sheet shows a "Set it in your character sheet" link that opens Edit Character.

DC checks

A GM can attach a difficulty class to a check, e.g. Make a DC 12 DEX Check. The roll then states Success or Failure — green if the total (die + modifier) meets or beats the DC, red if it falls short. DC checks also support with advantage / with disadvantage, rolling two d20s and keeping the best / worst before comparing to the DC.

Whichever way you roll a d20, a natural 20 shows Critical Success and a natural 1 shows Critical Failure — the die speaks for itself, even if the DC result says something different.

Quoting the source

Rolls made from a message quote the original, so it's clear which request each roll answers.