Alarm clock with customizable vibrations

Hi everyone,
I'm using my Forerunner 235 to wake up in the morning without disturbing my wife, but the vibrations are still too loud for her and I'd love to be able to set the intensity and duration so that they increase gradually until I wake up...

Is there a possibility to create an app with an alarm clock with customizable vibrations (or already set "crescendo") ?

Thanks in advance (from me and my wife !)