Calculator exclusively for SmartQ Z1

Compared to Google app 'Calculator'
- Not too small button.
- The Calulator has required some hard keys (e.g. dial pad).
- Omitted trigonometric functions and logarithms, which are not used much.
- Reliable Arity as calc-engine. The Calculator has uses it, too.

LICENSES
This app { uses | is based on } the following software.
- Arity
- com.android.calculator2 (Google)

Please read the following license.
- http://www.apache.org/licenses/LICENSE-2.0