diff --git a/firka/android/app/src/main/res/drawable-hdpi/ic_launcher_background.png b/firka/android/app/src/main/res/drawable-hdpi/ic_launcher_background.png
index a4b3758..791200f 100644
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diff --git a/firka/android/app/src/main/res/drawable-hdpi/ic_launcher_foreground.png b/firka/android/app/src/main/res/drawable-hdpi/ic_launcher_foreground.png
index ede3642..d4e1eca 100644
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diff --git a/firka/android/app/src/main/res/drawable-hdpi/ic_launcher_monochrome.png b/firka/android/app/src/main/res/drawable-hdpi/ic_launcher_monochrome.png
index 31e7cce..b0dc1a5 100644
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diff --git a/firka/android/app/src/main/res/mipmap-hdpi/launcher_icon.png b/firka/android/app/src/main/res/mipmap-hdpi/launcher_icon.png
index 630f7d9..236f11b 100644
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diff --git a/firka/android/app/src/main/res/mipmap-mdpi/launcher_icon.png b/firka/android/app/src/main/res/mipmap-mdpi/launcher_icon.png
index c7c3b95..cb91172 100644
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diff --git a/firka/android/app/src/main/res/mipmap-xhdpi/launcher_icon.png b/firka/android/app/src/main/res/mipmap-xhdpi/launcher_icon.png
index f55a4d5..b6de93a 100644
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diff --git a/firka/android/app/src/main/res/mipmap-xxhdpi/launcher_icon.png b/firka/android/app/src/main/res/mipmap-xxhdpi/launcher_icon.png
index a816189..0a35a69 100644
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diff --git a/firka/android/app/src/main/res/mipmap-xxxhdpi/launcher_icon.png b/firka/android/app/src/main/res/mipmap-xxxhdpi/launcher_icon.png
index 86054c6..2125e79 100644
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diff --git a/firka/scripts/codegen.dart b/firka/scripts/codegen.dart
new file mode 100644
index 0000000..00d5e97
--- /dev/null
+++ b/firka/scripts/codegen.dart
@@ -0,0 +1,137 @@
+import 'dart:io';
+
+import 'package:path/path.dart' as p;
+
+void main() async {
+  final root = _projectRoot();
+  var ran = false;
+
+  if (_iconsOutOfDate(root)) {
+    stdout.writeln('Icons out of date, running flutter_launcher_icons...');
+    await _run('dart', ['run', 'flutter_launcher_icons'], root);
+    ran = true;
+  }
+
+  if (_l10nOutOfDate(root)) {
+    stdout.writeln('l10n out of date, running flutter gen-l10n...');
+    await _run('flutter', [
+      'gen-l10n',
+      '--template-arb-file',
+      'app_hu.arb',
+    ], root);
+    ran = true;
+  }
+
+  if (_isarOutOfDate(root)) {
+    stdout.writeln(
+      'Isar generated dart files out of date, running build_runner...',
+    );
+    await _run('dart', ['run', 'build_runner', 'build'], root);
+    ran = true;
+  }
+
+  if (!ran) {
+    stdout.writeln('All generated files are up to date.');
+  }
+}
+
+String _projectRoot() {
+  final script = p.canonicalize(Platform.script.toFilePath());
+  return p.dirname(p.dirname(script));
+}
+
+DateTime? _modified(File file) {
+  if (!file.existsSync()) return null;
+  return file.lastModifiedSync();
+}
+
+bool _anyNewerThan(Iterable<File> inputs, File output) {
+  final outTime = _modified(output);
+  if (outTime == null) return true;
+  for (final f in inputs) {
+    final t = _modified(f);
+    if (t != null && t.isAfter(outTime)) return true;
+  }
+  return false;
+}
+
+bool _iconsOutOfDate(String root) {
+  final config = File(p.join(root, 'flutter_launcher_icons.yaml'));
+  final pubspec = File(p.join(root, 'pubspec.yaml'));
+  final imagePath = File(p.join(root, 'assets/images/logos/colored_logo.webp'));
+  final monochrome = File(
+    p.join(root, 'assets/images/logos/monochrome_logo.png'),
+  );
+  final background = File(
+    p.join(root, 'assets/images/logos/colored_logo_without_mustache.png'),
+  );
+  final foreground = File(
+    p.join(root, 'assets/images/logos/colored_logo_only_mustache.png'),
+  );
+
+  final inputs = [
+    config,
+    pubspec,
+    imagePath,
+    monochrome,
+    background,
+    foreground,
+  ].where((f) => f.existsSync()).map((f) => File(p.canonicalize(f.path)));
+  final output = File(
+    p.join(
+      root,
+      'android/app/src/main/res/mipmap-anydpi-v26/launcher_icon.xml',
+    ),
+  );
+  return _anyNewerThan(inputs, output);
+}
+
+bool _l10nOutOfDate(String root) {
+  final l10nDir = p.join(root, 'lib/l10n');
+  final l10nYml = File(p.join(root, 'l10n.yml'));
+  final arbs = Directory(l10nDir)
+      .listSync()
+      .whereType<File>()
+      .where((f) => f.path.endsWith('.arb'))
+      .map((f) => File(p.canonicalize(f.path)))
+      .toList();
+  final inputs = [l10nYml, ...arbs].where((f) => f.existsSync()).cast<File>();
+  final output = File(p.join(root, 'lib/l10n/app_localizations.dart'));
+  return _anyNewerThan(inputs, output);
+}
+
+bool _isarOutOfDate(String root) {
+  final modelsDir = p.join(root, 'lib/helpers/db/models');
+  if (!Directory(modelsDir).existsSync()) return false;
+
+  for (final entity in Directory(modelsDir).listSync()) {
+    if (entity is! File || !entity.path.endsWith('.dart')) continue;
+    final content = entity.readAsStringSync();
+    if (!content.contains("part '") || !content.contains('.g.dart')) continue;
+
+    final baseName = p.basenameWithoutExtension(entity.path);
+    final gPath = p.join(modelsDir, '$baseName.g.dart');
+    final dartFile = File(p.canonicalize(entity.path));
+    final gFile = File(gPath);
+    if (_anyNewerThan([dartFile], gFile)) return true;
+  }
+  return false;
+}
+
+Future<bool> _run(
+  String executable,
+  List<String> args,
+  String workingDirectory,
+) async {
+  final result = await Process.run(
+    executable,
+    args,
+    workingDirectory: workingDirectory,
+    runInShell: true,
+  );
+  if (result.exitCode != 0) {
+    stderr.write(result.stderr);
+    exit(result.exitCode);
+  }
+  return true;
+}