App Inventor 2 how to use clock component as countdown

So you are newbie for app inventor 2 community and ๐Ÿค” about how to make a countdown don’t worry ๐Ÿ˜‰



Clock component trigger “

” when internal timer expired

When you set timer enabled and timer interval to 1000ms. “when.timer” block triggered after 1second thats clock component working mechanism.

So if you want make a countdown like countdown from 30s and display it on a label you can use this block all this blocks is simple

And here settings for timer block.

And here you can find aia file

I hope you understand

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