diff --git a/README.md b/README.md
index 3554cdc..67ee7d6 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,18 @@
-# QtZeiterfassung
\ No newline at end of file
+# Zeiterfassung
+This tool helps me assigning my working hours to various accounts at work.
+
+## Building from source
+```
+git clone https://github.com/0xFEEDC0DE64/QtZeiterfassung.git
+mkdir build_QtZeiterfassung
+cd build_QtZeiterfassung
+qmake ../QtZeiterfassung
+make
+```
+
+## Launching
+```
+./zeiterfassung
+```
+
+This tool saves its configuration using [QSettings](https://doc.qt.io/qt-5/qsettings.html). On linux, the configuration files are placed in `~/.config/db-software/zeiterfassung.conf`. **Be careful!** This config file contains your password in plain text (if you log in correctly). You can alter the code in main.cpp to change the behaviour of QSettings (for example: saving into an ini file at working directory).