Freezes too often – Running Slimkit - Lose Weight Review

I was doing great for three weeks with the free version. Now, anytime I switch apps (like to play another song) the app freezes. I've ended up running or walking much longer than I was suppose to. I've read reviews and it doesn't look like upgrading is going to solve this. I closed this app this morning and opened another one just to finish my workout.
Review by elizab14 on Running Slimkit - Lose Weight.