Smart Tools is a toolbox of a collection of 1-4 series. It includes 4 Pro versions that have 14 tools. In a word, All-in-One.
 Part 1. Length, Angle, Slope : Smart Ruler & Protractor Pro
 Part 2. Distance, Height, Width, Area : Smart Measure Pro
 Part 3. Direction, Metal detector, GPS : Smart Compass Pro
 Part 4. Sound level meter, Vibrometer : Sound Meter & Vibration Pro
 For more description, see the pages for each of the apps.
 
Do you want to have more features? Feel free to contact me. IΓÇÖll reply it ASAP. I hope my apps are useful to you. Thanks.
 
WhatΓÇÖs in this version:
 - v1.4.5 : Sound meter update. minor fix.
 - v1.4.5a: widget icon changed.
 - v1.4.4 : Compass update. Flashlight widget bug fix.
 - v1.4.3 : Thread pitch gauge update. horizontal level bar.
 - v1.4.2 : Flashlight widget added.
 - v1.4.0 : Flashlight app added. ICS support.