Bubble Level Digital is design for practical use. I do not name it spirit level, because measurement reading is easy, take not much spirit and effort. The software can detect not only object level in one direction, but level for a plate in all direction at one shot. It detect vertical of an object too. In vertical - measurement mode, you can also measure an object's elevation angle. The software maintain the same functionality even when the phone facing downward to the ground; In some situation, you may need to do so. It has an Easy - Elevation - Angle - Reading - Option. Once you enable this option, it will make your reading fast and enjoyable. The images colors are very attractive. The digital device is so realistic that it beats many toys. Please try it! Thank you very much!