CalcKit is the most powerful All-in-One Calculator Pack for Android. It 
features over 150 unique calculators and unit converters, packed in with a highly customizable scientific calculator and even allowing you to build your own calculators and converters.
Useful for students, teachers, builders, engineers or just the lay user. CalcKit has it all. The 150 calculators include normal, scientific, electronics, converters of all kinds, currency converters, finance and much more. You even have a unique custom tools creator which can have upto 25 variables. With integrated search and notepads, this is a calculator worth exploring if you deal with all kinds of figures.
Android: http://bit.ly/2R5aJYL iOS: https://apple.co/2R5tE5X
On-lyneTech 