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Augur is a probability companion for fantasy mass-battle wargaming. Five simulators — Charge, Spells, Templates, Leadership, and Combat result — show the real distribution behind a roll. Two more tabs, Score and Rules, run a full matched-play game and a searchable rules quick-reference.

No. Augur is an unofficial fan-made probability tool, not affiliated with, endorsed by, sponsored by, or specifically approved by Games Workshop Limited. "Warhammer", "The Old World", and all related marks are intellectual property of Games Workshop Limited and used here for descriptive, non-commercial reference only.

Augur runs on iPhone, iPad, and Android phones and tablets, with light and dark themes and the New Architecture enabled. You can reorder or hide tabs to match how you play.

Yes. Augur opens on a sign-in screen — pick Sign in with Apple or Continue with Google. Sessions are persisted locally so you only sign in once. Once you're in, every simulator runs on-device; the account is mainly for syncing presets and supporting account deletion on request.

Open the About modal and choose Sign in with Apple, Sign in with Google, or (in dev builds) the developer fallback. Sessions are persisted in the system secure store, so you stay signed in across launches until you sign out.

Signed-in users can pull character and unit presets into the Combat tab from a companion presets server. Everything else — Charge, Spells, Templates, Leadership, Score, and Rules — works fully offline without an account.

Yes, in development builds. Override EXPO_PUBLIC_PRESETS_API_URL in your local env to point at your own deployed presets API. Production builds are pinned to the default URL.

Open the About modal and tap Sign out. This clears the secure-store session immediately; presets stop loading until you sign in again.

Open the About modal and use Delete account. This removes your account and any synced data on our side. You can also request deletion via the contact form at the top of this page; we process those within 30 days.

Charge rolls in The Old World aren't a flat 2d6 — rerolls, swiftstride, terrain, and minimum-distance rules all warp the distribution. Augur computes the exact distribution rather than an average, which is usually what your gut is missing.

Presets require a network connection and a signed-in account. If you're online and signed in, the presets server may be temporarily unreachable — try again in a minute, or input characters manually.

Yes. Each model in lib/ is a pure function with a Jest test suite, so the same inputs always produce the same probability output. The sample fight log is generated from a seedable RNG for the same reason.

Augur uses Expo OTA updates, keyed to the runtime version. Most fixes ship without a store update — relaunch the app to pick up the latest release on your channel.

Open the About modal. It shows the build number, runtime version, active update channel, and the current update id — exactly what we need if you file a bug.

Crash reports via Sentry, anonymous product analytics via Vexo and EAS Insights, and — only if you sign in — your account email and id from Apple or Google. Simulator inputs and outputs stay on your device.

Presets are fetched on demand from a presets API and cached in memory for the session. They are not persisted to disk and are never sent anywhere else.

Use the contact form at the top of this page. Include the request and any account identifier you signed in with — we respond within the timeframe required by your local law. Full details are in our privacy policy.