Smart Protractor is an app that is part of the Smart Tools collection. This app is designed to measure the angle and slope of an object. It has three protractor modes, including touch mode, plumb mode, and camera mode. The touch mode is used for measuring angles, while the plumb mode is used for measuring slopes. The camera mode is used for goniometer and inclinometer measurements.<br/><br/>The app has several main features, including tilt units such as degrees, percent, and radians. It also has a zero calibration feature and an orientation sensor that can be turned on or off. The app has a material design that makes it easy to use and navigate. <br/><br/>The pro version of the app has additional features, including no ads, various tilt units, screen capture, ruler, level, and thread pitch. If you want more tools, you can download the Smart Ruler Pro and Smart Tools package. For more information about the app, you can watch YouTube videos or visit the blog. <br/><br/>Overall, Smart Protractor is a useful app for anyone who needs to measure angles and slopes. It is easy to use and has several features that make it a great tool for professionals and hobbyists alike.