Talking Calculator - Undo, Mul

1. Text-to-speech voice function

You can prevent mistakes by hearing the voice

2. Undo function

Each time you press the back space button, you can go back to the past input.
You can also go back to past inputs after the calculation, so we can respond flexibly to typing mistakes.

3. Mutilingual - number format

It corresponds to the difference in the digital format of each country.
(example)
1,234,567.89 Japan
1 234 567,89 France
1.234.567,89 Germany
1'234'567.89 Switzerland

4. Mutilingual - speech

This application uses Google's TextToSpeech (TTS) feature, so it can use multiple languages.