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 - Smart Light Pro
Even more tools will be added soon. Next will be Barometer and more.
Required Android O/S : 2.2 & Up.