Is it a free app or paid one?
- It is a free app. Most functions of the app is free, you can keep using it as you like. And we will keep improving it.
- The free functions of the app can meet most user's requirement, and the humanized design is far beyond other similar ones.
- The modest pay will help me to keep improving the app. We have cost several years on it, and really hope you can understand that.
Why to be a paid user?
- Paid user can insert words, which is very convenient for you making notes.
- Paid user can use calculation process function, which is very convenient for teachers and parents to check homework or other use.
- Paid user can apply all themes.
- Free user can save only two calculation history record. There is no limit for paid user.
- Free user can define only two constants and two functions. There is no limit for paid user.
- Paid user can copy and paste the whore text.
- Paid user can export text history, constants and functions to sd card, or export to text file.
- Hex conversion with decimal.
- Paid user can forward copied text to others.
- Paid user can copy amount in words to clipboard.
- Paid user will not see advertising.
What new features will be in the future versions for paid user?
- Calculation history.
- Take notes in equation.
- More creative themes.
- Self define buttons.
- More variable available beside X, Y, Z.
- Currency data can be imported all at once.
- Modulo operation, like: 5|3=2.
- N-ary conversion.
- Thousand separator.
- Power and n-th root notation.
- ¡ã¡ä¡å will be input and can be calculate.
- Other functions(such as: graph drawing, solve equations, time calculation, integral calculation).
How to pay?
- Press pay button below will pay by paypal, please see more details on "How to pay?" page.