The countdown app is part of Airtable Apps, a Pro plan feature. Apps let you extend the functionality of your bases: you can use apps to bring new information into Airtable, visualize and summarize your records in colorful ways, and even directly integrate your Airtable bases with your favorite apps.
The countdown app shows a big countdown clock in the color and units of your choosing. You can set it to count down to a specific date and time, or to the earliest or latest date in a specific view.
When you first add a countdown app to your base, it'll automatically open the new app's settings page. There are two ways for you to set a date for the countdown app: you can set the countdown app to count down to a specific date, or you can it to count down to a date from a view.
If you want the app to count down to a specific date, simply click on the date/time picker and select the desired date and time, or type in your desired date and time.
If you want the app to count down to a date from a view, click the Date from view option, then specify a table, view, and date field. You can choose whether you want the app to count down to the earliest date in a view or the latest date in a view.
If you choose to count down to a date from a view, the countdown will change if the earliest or latest record in the view changes. For example, you can create a filtered view which shows all records with deadlines after today, and set the countdown app to count down to the earliest date in that view. As deadlines pass and records leave the view, the countdown app will change to match the new earliest dates in the view.
You can customize the countdown's time units—from years and months down to minutes and seconds—by checking and unchecking the appropriate boxes in the Units section. You can also adjust the color of the countdown numbers.