great idea, Id rather hardware rather than software.
Yes and no I agree with the simplicity of hardware. Another problem as you I find myself setting up camp after dark and ready a level in the dark PIA. I do like the thought of being able to find my perfect spot and just look at my ipad and know where and how many of blocks I need and where to be perfect. This would make for a one time leveling move. A mechanical level will tell you are off but not how much.