Talk the tapped number and operator, talk the result of calculation.      

• Talk in English or mute by setting the preferences in the setting view.
• Professional Edition could display the detail expression in the main view
• The full expressional could be record in the log view
• Set the talking speed from the setting view.
• Set the talking volume from the setting view.

• One expression could include more than one operator: (A+B)*C-D.
• Step 1: A+B
• Step 2: (the result of step 1) *C  
• Step 3: (the result of step 2) -D.

• In the professional edition,Detail expression could be displayed in the main view.
• Single view for single expression: When the expression is too long, the user tap the expression in the log view, the full expression view will be displayed.

• Contact: Click the following link, open the contact form and fill the message.
• Before filling the contact form, you need to prepare the following items:
• Item 1: Your Official Name in English
• Item 2: Your Email Address
• Item 3: Subject in English
• Item 4: Contact Message in English
• 　
•      Open the Contact Form