I have been using golfshot GPS for over a year and find it very smooth and easy to use while on the course. I have used it on both an iPhone and an android but it's smoother on the iPhone. I just got golfLogix but find it a bit distracting to load on the course even though the feedback on ones game golflogix is definitely more detailed. By and large I think I will be sticking to Golfshot for now until golflogix software is made easier and smoother to work with on the fly.