Need a bot to be triggered by a data change (row add) from another app or outside process

[Patrick_Paul]

I have two apps that need to "communicate" with each other.  Both edit the same spreadsheet, but only one adds new rows, the other only updates a particular column of existing rows.  I need a bot/automation to be triggered in the "update"-only app when the other app adds a new row.  Currently, the automation won't fire because the other app is adding the rows, it is not happening "natively" within the app.  How can I trigger this bot from rows added by the other app?  Surely this is possible.  Thanks!