Level inaccurate, other features not for iTouch – Toolbox± Review

Checked the level on a surface I know has a 1.7% grade, but this level didn't seem to notice. Flashlight and compass don't work on my iTouch, so I assume they require iPhone (camera flash and cellular connection to GPS?). Friendly UI though.
Review by 100 Watt Walrus on Toolbox±.