diff --git a/src/settings/SettingsScreen.tsx b/src/settings/SettingsScreen.tsx
index 02e328b..39ee3e0 100644
--- a/src/settings/SettingsScreen.tsx
+++ b/src/settings/SettingsScreen.tsx
@@ -76,6 +76,26 @@ export type SettingsScreenProps = {
  * No tabs. The tabbed variant exists for pages with several named sections to choose between; this
  * one has the app's own section and About, and a row of two pills is chrome rather than navigation.
  */
+/**
+ * Which build this is, in OUR versioning rather than Apple's.
+ *
+ * `1.0.0` is a marketing string nobody maintains — it has said 1.0.0 for every build ever made here and
+ * conveys nothing. What identifies a build is the date-stamped number OAS assigns and writes into
+ * CFBundleVersion before signing, which is also what the install page shows. Showing the same string in
+ * both places is the whole point: it makes "is the thing on my phone the thing on the site?" answerable
+ * by looking, rather than by remembering which link was tapped.
+ *
+ * Dotted for reading, stored undotted — 2026081501 becomes 2026.08.15.01.
+ *
+ * A build that has not been through OAS (a cable install, a Metro run) has no such number, so anything
+ * that is not exactly ten digits is shown verbatim instead of being mangled into a fake date.
+ */
+function buildLabel(): string {
+  const raw = Constants.nativeBuildVersion ?? '';
+  if (!/^\d{10}$/.test(raw)) return raw ? `dev (${raw})` : 'dev';
+  return `${raw.slice(0, 4)}.${raw.slice(4, 6)}.${raw.slice(6, 8)}.${raw.slice(8)}`;
+}
+
 export const SettingsScreen = ({
   title,
   onClose,
@@ -166,7 +186,7 @@ export const SettingsScreen = ({
               */}
               <SettingsRow label="Version">
                 <Text style={{ color: palette.textMuted, fontVariant: ['tabular-nums'] }}>
-                  {`${Constants.expoConfig?.version ?? '1.0.0'} (${Constants.nativeBuildVersion ?? 'dev'})`}
+                  {buildLabel()}
                 </Text>
               </SettingsRow>
               {onShowCredits ? (