This application has the following features:

- High level of customization with an adjustable difficulty
- Simple rustic design
- Select the operation/s to practise (addition, subtraction, multiplication and division)
- Fix the initial time
- Establish the number of digits of each operand in the different operations
- Choose the recovered time when answering correctly each type of the operation
- Time Trial! Setting the recovered time to 0.
- Final screen that shows the amount of correct answers and also the total of operations done.
- Check your results and improve your mental math calculation