Re: Duration format hh:mm:ss

I don't remember exactly how to do that but I think it is easy to do using timepicker component. A few time ago I found a very good example on the gallery, search for timepicker there and you will probably find it.

When I arrive home I can give you a hand if you don't succeed.

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It would really help if you provided a screenshot of your relevant blocks, so we can see what you are trying to do, and where the problem may be.

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here is a solution, it's a little bit complicated, probably someone comes up with a simpler solution...

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look here

http://developer.android.com/reference/java/text/SimpleDateFormat.html

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I do not know whether it is simpler. In any case, it is different. 

From my count-down-to-2016 in the gallery, http://ai2.appinventor.mit.edu/#6702056039776256

Here is the relevant procedure:

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