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

For more information, see the manual for each of the apps, watch the YouTube video and visit the blog: http://androidboy1.blogspot.com/

Even more tools will be added soon. Next will be Barometer and more.

Do you want to get more tools and features? Please send an email. I'll reply to it ASAP.

I hope my apps are useful to your SMART Life. Thank you.

* A magnetic sensor is required. So this app cannot support several android devices (e.g HTC Desire X).

** Off-line support (for Wi-Fi only devices) : Open this app several times with connections, you can open it without connection.

*** This app had been published only on Google Play and Androidpit (not Amazon app store).