Advance ToolKit is a complete package of 8 app sets. It includes 8 tools in a word, All-in-One. Set 1: Length, Angle, Slope, Level, Thread - Advance Height. Set 2: Distance, Height, Width, Area - Advance Distance. Set 3: Sound level meter, Vibrometer - Sound Meter. Set 5: Flashlight, Set 6: Magnifier. Set 7: Mirror. Set 8: Advance Torch Light.