diff --git a/docs/adr/0004-linter.md b/docs/adr/0004-linter.md
new file mode 100644
index 000000000..6cb887fe4
--- /dev/null
+++ b/docs/adr/0004-linter.md
@@ -0,0 +1,26 @@
+# 3. Integrate linter into app
+
+Date: 2022-04-22
+
+## Status
+
+Accepted
+
+## Context
+
+- Use linter to encourage good coding practices
+- Helps optimize and increase application performance
+
+## Decision
+
+- To use we follow these steps:
+    + Depend on this package as a `dev_dependency` by running `flutter pub add --dev flutter_lints`.
+    + Create an `analysis_options.yaml` file at the root of the package (alongside the `pubspec.yaml` file) and include: `package:flutter_lints/flutter.yaml` from it.
+
+## Official document
+
+- [flutter_lints](https://pub.dev/packages/flutter_lints)
+
+## Consequences
+
+- The code is written standard according to the linter toolkit. Performance is improved.