iFormula - Create Your Calculator with Formula, Expression and Input Form for Your Calculation Like Excel

Tired of inputing same formula on calculator again and again? Like the cool feature of Microsoft Office Excel - input a formula once, and reuse it any time by changing formula fields' value? Yes, iFormula provides the feature.

With iFormula, you can:
- create any type of formulas and any number of formulas for your calculations
- use an intuitive but powerful formula editor to create a formula quickly - simply tap and drag.
- create input field and constant field which can be referenced in formula
- take use of powerful functions, including sum, avg, max, min, abs, pow, root, sqrt, log, sin, cos, etc.
- run it any time, what you need do is type value of fields used in formula
- assign icon to your calculations
- add description

Please watch demo on YouTube: http://youtu.be/oIQ88CWw_pA, as follow:

If you can't watch the above video, try this one: http://v.youku.com/v_show/id_XNTg5NTY5MDI0.html