What do you use your Smart Phone for?

It is interesting what I find myself using my smart phone for. Just this morning I was bench bleeding a master cylinder. The instructions say to push the plunger until there is no bubbles coming from the little hole that goes into each cylinder. I cannot see down in there while I am pushing on the plunger. So, I laid my phone down over the fill hole and pushed record. lol

So, what all do you use your phone for while working on these big yellow tin cans?

I didn't find the right solution from the internet.
References:

http://www.schoolbusfleet.com/forum/topic.asp?TOPIC_ID=40033

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