Data Entry Is Problem for Both
Both programs require multiple taps to enter each digit. This is time consuming. Another program, MPG Tracker, displays a numeric key pad when you tap into each of the fields - miles, gallons, price. So data entry is faster and easier.
The biggest problem I have with Fuel Blaster is that I entered the data, and tapped on the Save button but nothing happened. When I moved to another screen, my entries had not been saved. I had to do this three times before I finally got a message asking if I wanted to create another data set. I tapped Yes, and my data was saved. I have no problems with my screen responding to taps in other programs. I can't understand why the large Save button does not easily save my data - and I don't need a confirmation screen; just save the data.
Gas Mate has not been updated since 2009 and the design reflects the old stylus entry screens.
All three programs need better Exit methods that actually shut down the program and remove it from memory. Many programs do thnis, so it can be done.
I will test all three for a while, but right now, MPG Tracker appears to be better for recording fuel consumption. It allows for different fuel grades and multiple vehicles. If I used my vehicle for business, I would probably get one of the better, paid programs that does more.