Smart Tools is a complete package of 5 app sets. It includes 5 Pro sets for a total of 15 tools. In a word, All-in-One. Set 1: Length, Angle, Slope, Level, Thread - Smart Ruler Pro Set 2: Distance, Height, Width, Area - Smart Measure Pro Set 3: Compass, Metal detector, GPS - Smart Compass Pro Set 4: Sound level meter, Vibrometer - Sound Meter Pro Set 5: Flashlight, Magnifier, Mirror - Smart Light Pro For more information, see the manuals of the apps, watch YouTube video and visit the blog: http://androidboy1.blogspot.com/ Do you want to get more tools and features? Please send an email. [email protected] I hope my apps are useful to your SMART Life. Thank you.

• Off-line support (for Wi-Fi only tablets) : Open this several times with internet, you can open it without internet. A magnetic sensor is required. So this app cannot support several android devices (e.g HTC One V). * This is one of the essential apps of Google Play for Education.