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</br></br></br></br></br></br></br>