diff --git a/README.md b/README.md
index a4b7ac8..22c7e04 100644
--- a/README.md
+++ b/README.md
@@ -227,6 +227,7 @@ If you are not a programmer but would like to contribute, check out the [Awesome
 - [Atrium](https://github.com/robstoll/atrium) _(label: good first issue)_ <br> Multiplatform assertion library for Kotlin
 - [Hexagon](https://github.com/hexagonkt/hexagon) _(label: help-wanted)_ <br> A microservices toolkit written in Kotlin
 - [Non-Blocking SirixDB HTTP(S)-Server](https://github.com/sirixdb/sirix) _(label: good first issue)_ <br> A non-blocking HTTP(S)-Server for SirixDB, a temporal, evolutionary NoSQL document store for XML and JSON.
+- [OpenCalc](https://github.com/Darkempire78/OpenCalc) _(label: good first issue)_ <br> A simple and beautiful calculator for Android.
 
 ## LaTeX