Abacus Pro Calculator

This app can perform super fast calculations for education and industrial uses. It is integrating the ancient wisdom and modern digital technology with 14 columns and have 5 selections.
Highlighted features:
1. continuous calculating methods.
2. data input can be modified from time to time.
3. detailed history of operations.
4. results can be emailed.
5. sound supported.
6. best tool for students and professionals.
7. can replace most of the digital input calculators.
8. use leading data input method.(tap the function button before data entry)
9. For Basic system: it comes with integers, and 4 decimal places.
10. For Scientific system: it comes with integers, 2 decimal places, and 4 decimal places.