In terms of real-world applicability, this might be the most useful iPhone application to date. So, just what is this uber-useful third-party iPhone app? Well, it’s called “iLevel,” and it is, well, a level. iLevel makes use of the iPhone’s integrated accelerometers to function as a digital level for all your picture-aligning, table-building, driveway-leveling needs. Ok, you probably wouldn’t use your iPhone to help level your new concrete driveway, but you could if you wanted to… Grab iLevel from the iApp-a-day source in your Installer.app. What, you still haven’t installed it yet? What are you waiting for? Go here , run Installer.app, then install the iApp-a-day from the “Source” list, and then find and install iLevel. What are you waiting for? That picture ain’t gonna straighten itself, now is it? [Via: iPhone Atlas ] ---Related Articles at IntoMobile:An Apple iPhone native app-a-day keeps the boredom awayFacebook hits the iPhone!iPhone release date known, again; Set for June 20Apple iPhone release date confirmed - iPhone Launches June 29!!Apple launches iPhone web-app portal - find all iPhone web-apps through Apple's catalogue