Worse than Nothing - Save Your Money
I needed an inclinometer for my Jeep. After reading the reviews for several similar apps, I chose 3pLevel Pro. The description for the says it is minimalistic and they are not kidding. First it is not accurate. Second there is not a way for the user to initiate recalibration in order to improve accuracy. In fairness at one point at one point an option to recalibrate appeared but just as quickly was gone. Now that I need it there is no option to for me to initiate it. Third the help option only tells what the switches in the preferences panel are for. The titles for the switches are self explanatory so the information provided by the help option does not really provide any benefit. If I could get my money back I would.