To modify the bell strike interval, perform the following instructions:
- Open the Insight Timer app on your device.
 - Tap the menu icon (☰) in the top-left corner.
 - Scroll down and select "Settings."
 - Go to "Features & Preferences."
 - Locate the "Timer" under Features.
 - Select 'Bell strike interval'.
 - Adjust the slider to define your desired bell strike interval.