Bubble level/plumb that supports camera preview, custom inclination for slope, pitch display, look and feel like a real bubble level, smooth bubble movement. Support both phones and tablets. Please email us if needs help instead of leaving a negative reviewFAQ: 1. Internet access is for crash report and flurry tracking. 2. Orientation: It always works in landscape orientation because there is a bug on android early version that the camera preview doesn’t work in portrait orientation