Best phone apps for tracking expenses/reimbursements

So I am thinking about leasing. But before I make that decision I really need to get my ducks in a row. Even if I don't taxes are important and keeping on too of expenses and just having a good idea where my money goes. (And I need more than just truck stops). I would really like to find an all in one app as my iPhone is always with me. Something that keeps up with load assignments, notes that would help with load assignments. Mileage tracking each state and road. Mostly where my cash on hand goes. Track maintenance and fuel consumption. I have heard that truckers helper is good and maybe quickbooks but neither have iPhone apps. So my question is what do practical truck drivers use?