Absolutely. Of late I have an iOS app to measure the grade of hills. Initially this was to avoid parking tickets in San Francisco which requires curbing your tires for a 3% grade. The reality is that this is basically no grade and you should just curb no matter what in SF. Still fun to know how steep the hills are when walking. The other one is to set the exif data on photos to be taken in Pyongyang 100m underground tomorrow. This me is probably going to get me and my friends in trouble with the NSA for messing up their database, but these things happen.