App to track mileage and time

[MartyStickle]

I do a lot of charity work for a local agency and I'd like to track my hours (they need this for grant purposes) and mileage for IRS tax deduction for me. I've googled my head off and searched the app store and either they're expensive, use gps tracking which I don't want, or require one to register and login. I guess what I really want is a simple way to keep track of miles driven and time spent. Something like an always available spreadsheet would be great. BTW, this would be for the iPhone. Would love suggestions.