Chronicall Desktop includes a packaged version of Java. If Chronicall struggles to stay online, you can increase the memory allocation by following these instructions. To increase the Java memory limit for Chronicall Desktop:
Go to C:\Users\<user name>\AppData\Local\Chronicall Desktop\app\ and edit Chronicall Desktop.cfg (if prompted how to open, you can use notepad).
Add this line at the bottom: jvmarg.1=-Xmx512m (example below)
Save the changes. Relaunch Chronicall Desktop or Chronicall Browserless to have the change take effect.