Update readme.md

Author: xxczaki

readme.md

@@ -24,9 +24,19 @@
 
 ## Download
 
-You can install Parsify Desktop for free from the official website or using [GitHub Releases](https://github.com/parsify-dev/desktop/releases).
+You can install Parsify Desktop for free using [GitHub Releases](https://github.com/parsify-dev/desktop/releases).
 
-The free version is limited in functionality, more details can be found on [this page](https://docs.parsify.app/miscellaneous/free-vs-activated). You can buy the license from the official site as well, supporting further development and unlocking additional features. **We offer significant discounts for students of all  ages.**
+The free version is limited in functionality; more details can be found in [the documentation](https://docs.parsify.app/miscellaneous/free-vs-activated). You can buy the license from the [official site](https://parsify.app), supporting further development and unlocking additional features. 
+
+**We offer significant discounts for students of all ages.**
+
+## Supported platforms
+
+- macOS 10.11+
+- Windows 7+ (64-bit only)
+- Linux (most distributions)
+
+Each release is tested on the latest version of macOS, Windows, and Linux Ubuntu.
 
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