SightLeveler

Replace the need for an expensive laser or transit level with this app!
Now you have a simple tool for visually finding level. With a few simple techniques, outlined in the instructions, you can level almost anything!
Created with the avid DIYer in mind, SightLeveler is a simple and affordable tool for general leveling projects.
SightLeveler is perfect for many situations:
Verifying elevation
Measuring grade
Establishing drainage slopes
Leveling fences and post tops
Plotting contour lines in the landscape
Grading driveways
Swimming pool installations
Once SightLeveler is calibrated it is simple to use, just align the crosshairs to a mark or object and that mark is at the same elevation as your phone. Add a steady stick of a known height and you have a tool to measure and mark level anywhere.
For recreational use only. While we strive to make SightLeveler as accurate as possible, hardware and calibration variations can limit the tool's accuracy.