diff --git a/README.md b/README.md
index 8de700f..ea5ec79 100644
--- a/README.md
+++ b/README.md
@@ -129,3 +129,5 @@ These builtin apps can be found at: https://github.com/m5stack/M5Cardputer-UserD
 - [Rust firmware hal and examples](https://github.com/Kezii/Rust-M5Stack-Cardputer)
 - [Simple StopWatch](https://github.com/qubiX00/stopwatch-cardputer)
 - [Weather App](https://github.com/qubiX00/weather-cardputer)
+- [MiniAcid](https://github.com/urtubia/miniacid)
+  - [Demo site](https://miniacid.mrbook.org)