diff --git a/apps/1button/README.md b/apps/1button/README.md
index 13c716f97..13a2724c0 100644
--- a/apps/1button/README.md
+++ b/apps/1button/README.md
@@ -1,6 +1,6 @@
 # The One Button tracker
 
-A simple widget that turns the `BTN1` of your Bangle.js into a one-button-tracker that can be used right from the clock face. Record when you're sneezing, yawning, eating, or whatever you think the button should track for you.  
+A simple widget that turns the `BTN1` of your Bangle.js into a one-button-tracker that can be used right from the clock face and everywhere else. Record when you're sneezing, yawning, eating, or whatever you think the button should track for you.  
 
 ![](one-button.GIF)
 
@@ -10,6 +10,8 @@ Every time you press & release the `BTN1` from the clockface this widget will re
 
 Once you release `BTN1` both the start & end time of your button press will be saved in 2-column `one_button_presses.csv` CSV file on your _Bangle.js_. The CSV file can [be downloaded from the _My Apps_ tab on the Bangle.js app store](https://banglejs.com/apps/).
 
+To not interfere with alternative usages of `BTN1` (eg when using it for menu navigation) you need to keep the button pressed for at least 130 milliseconds before it triggers a recording (the vibration & LED will inform you about having triggered it).
+
 ## Features
 
 - Track whatever events you want with a simple button press on your wrist