General engineering free for Android

General engineering free app for android description: This application consolidates as many as it can of important engineering formulas while giving the chance for any engineer to apply the formulas through organized ready forms.
Get rid of the advertisements by buying the general engineering (paid) version.
This free version has stopped adding calculation modules.
It will only fix any possible bugs.
New modules are only added to the paid version.
Any positive constructive critique is welcome.
And if you want more modules to be added we 39 ll be very glad to do so.
But please concentrate on important hard to follow formulas when calculating manually.
This application is meant to ease calculations without getting lost between the variables of the engineering equation or formula.
Please write the review in either english or arabic.
The computer translation is weak.
Please read the description till the bottom.
It 39 s important.
In this application you can send the calculation results via: email (at least get gmail client for android installed) skype (if installed) sms (the usual classic mobile messaging).
In paid version only: a log of all calculations done with a time stamp so you don 39 t have to repeat calculating them.
The application covers the following topics: a table of units.
A table of physical constants.
Forward and backward conversion between units (more than 50 conversions).
From applied maths for engineers: 1 geometry area and volume.
2 finding the location of centroids of important shapes.
3 finding the roots of 2nd 3rd 4th and 5th degree equations with complex roots too.
From electrical and electronic engineering: 1 a module for ohm 39 s law.
It helps you find either power resistance intensity or voltage.
2 resultant sum of either of resistances capacitors or inductances whether they are in series or in parallel.
You can have up to 10 elements(which is more than enough)3 a module to find the change in the value of the motor resistance of the wire windings after getting some heat through runtime4 vo