Odd question but might be easy

Is it possible to create a simple app that has multip[le dimmers or even just a place for a string writable? I have written a code in webcore for a sprinkler system. I have 8 zones and 8 define statements for the run time for each zone . I have used virtual dimmer devices to adjust the times using the level on the dimmer. But what I am curious is how would i go about creating a smartapp with basically 8 channels of dimmers or something to set the value at 0-60 minutes.

If I understand it well, you could create a smartapp that contains a field with “multiple” state enabled, so you could select all your virtual devices at once.

https://docs.smartthings.com/en/latest/smartapp-developers-guide/devices.html#interacting-with-multiple-devices