I just bought an iPhone app yesterday. it's called noreastern storm systems. It's pretty basic but I plan to use it a lot. they have a mowing version and a plowing version. it's just a digital log pretty much but it stores all the customer info and you can click the little box showing what services you completed. you can also take a picture right in the app then email a "receipt" right to the customer. I think it gives a time stamp in the pic as well. the app was 99 cents. they have a free version but that one doesn't store the customer info. for 2 bucks, I think I found something good. I think I read over on plowsite that the app writer for this is a plowsite member.