Topicality

Functionally, would have to change layout for faster typing some small details in the keyboard. Where the constants has me not equal tapped.

Edit:
Timeliness of the app:
No sooner had I sent the text here, Amazon raised its version to the current version.

Constants:
There are no constants supplied. The you have to create all even. I'm spoiled by RealCalc.

Arithmetic:
sin (45 °) = 1 / sqrt (2) it can not
sqrt (sin (x) ^ 2 + cos (x) ^ 2) it can not
Because something is missing.

Also Hex / Bin / Dec is not his case. Here RealCalc may let off steam.

Edit 02/21/2015:
It has now been claimed that the above arithmetic is now properly resolved. Unfortunately, no. Both functions still appear false to me.