Band 7+: how often do you use a calculator

Your pronunciation is very good. Aim to refine subtleties and intonation to further improve.

The response is relevant to the question and provides a clear answer. Consider expanding on the types of calculations you perform and why you prefer your smartphone. More detailed examples would strengthen your response.

The answer is coherent and easy to follow. There is a slight repetition and slightly unnatural phrasing ("because everything is available and convenient on my smartphone and when I need to calculate something that time I use my smartphone"). More concise phrasing would improve fluency.

Vocabulary is adequate and appropriate for the task. More sophisticated vocabulary could be used to enhance the response. For example, instead of "once in a month," consider "monthly" or "approximately once a month."

Grammar is mostly accurate. The sentence structure could be improved for greater impact. The minor grammatical error ("that time") is easily overlooked.