How to create a timer when I check an item

A customer recently emailed the question…

I am trying to configure a 30 min fuel timer. Ive found the fuel timer template but how do I display it on the main screen?

My checklist comes up but there seems no way to access and control the timer.

In the MiraCheck Cloud web app, you can configure a timer to start after checking an item in the checklist. So a good place to start a 30 minute fuel timer would be right before or after taking off.

Here in my checklist I am starting a similar timer at the end of my pre-takeoff checklist.