diff --git a/radar/2021-01-01/flutter.md b/radar/2021-01-01/flutter.md
new file mode 100644
index 0000000..407a58b
--- /dev/null
+++ b/radar/2021-01-01/flutter.md
@@ -0,0 +1,18 @@
+---
+title:      "Flutter"
+ring:       assess
+quadrant:   languages-and-frameworks
+
+---
+
+[Flutter](https://flutter.io) allows writing native applications for different platforms with a single code base in [Dart](https://dart.dev).
+
+It provides stable platform implementations for both major mobile platforms iOS and Android.
+With [Flutter on the Web](https://flutter.dev/web) it is possible to build single-page applications (SPA) out of the same code with full support for service workers.
+The [Desktop](https://flutter.dev/desktop) (Windows, Mac, Linux) platform is currently still in beta (as of mid 2021).
+
+The compilation into native platform code prevents from bottleneck-issues due context switching and runtime bridging, which can be found in other cross-platform frameworks like [React Native](https://reactnative.dev).
+
+Comparing to a Javascript-based PWA, Flutter's approach promises a better performance and energy-efficiency.
+
+We gathered first positive experience with small applications, which used the Alpha and Beta state of Flutter for Linux (x64) and Web by the time of development.