diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4ada51d..1a3e0ef 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,21 @@ All notable changes to this project are documented here. The format follows
 
 ## [Unreleased]
 
+## [1.0.0] - 2026-09-21
+
+### Added
+- Agendula keeps your tasks itself now — nothing else to install. Manage lists
+  in the app, repeat tasks, and export any list as iCalendar.
+- Settings → Storage picks where tasks live, and offers to copy them over from
+  OpenTasks or tasks.org.
+
+### Changed
+- Another task app is now optional. Already use one? Nothing changes on update.
+
+### Fixed
+- Edited due times no longer revert, all-day tasks no longer drift a day, and
+  per-task reminders are saved.
+
 ## [0.4.0] - 2026-08-31
 
 ### Added
diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index b167842..8f4ae0b 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -27,10 +27,11 @@ android {
         // a bumped versionName into main triggers .gitea/workflows/release.yaml,
         // which builds this version and then creates the matching vX.Y.Z tag +
         // release itself (versionCode is pinned to MAJOR*10000 + MINOR*100 +
-        // PATCH from versionName, e.g. 0.2.0 -> 200). The Gitea release is marked
-        // as a pre-release while MAJOR is 0. See docs/RELEASING.md.
-        versionCode = 400
-        versionName = "0.4.0"
+        // PATCH from versionName, e.g. 1.0.0 -> 10000). Releases were flagged as
+        // pre-releases while MAJOR was 0; 1.0.0 is the first stable one, and the
+        // pipeline graduates it on its own. See docs/RELEASING.md.
+        versionCode = 10000
+        versionName = "1.0.0"
 
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
     }
diff --git a/fastlane/metadata/android/en-US/changelogs/10000.txt b/fastlane/metadata/android/en-US/changelogs/10000.txt
new file mode 100644
index 0000000..baffaf0
--- /dev/null
+++ b/fastlane/metadata/android/en-US/changelogs/10000.txt
@@ -0,0 +1,13 @@
+### Added
+- Agendula keeps your tasks itself now — nothing else to install. Manage lists
+  in the app, repeat tasks, and export any list as iCalendar.
+- Settings → Storage picks where tasks live, and offers to copy them over from
+  OpenTasks or tasks.org.
+
+### Changed
+- Another task app is now optional. Already use one? Nothing changes on update.
+
+### Fixed
+- Edited due times no longer revert, all-day tasks no longer drift a day, and
+  per-task reminders are saved.
+