Official Stanley iPhone Level
There are lots of apps in the iPhone App Store. There are lots of apps that provide leveling functions. But there is only one level app published by Stanley, the hardware people. The official Stanley level is apparently the most accurate level app available. I just downloaded and tested it (it’s free), and it seems to detect that my walls are indeed level. I would dispute this, because I’m pretty sure this house was built by a bunch of drugged out sailers on shore leave.
I’m looking forward to using this next time I’m trying to rebuild my retaining wall with adobe bricks. Is it bad to use baked mud to hold back water? (btw, that pic was taken from my iPhone – first time I’ve ever used that feature.)