NS Calculator With History, or 【NS计算器】多功能专家, is a free utility tool available for iPhone users. This feature-rich application boasts a compact design, an absence of advertisements, and a wide range of functions that are all free to use. Users can access various calculators including standard, scientific, mortgage, tax salary, exchange rate, date, BMI, and more. Additionally, the app offers system-level features such as ad-free experience, light and dark mode, customizable launch page, multiple theme colors, sound effects, and vibration feedback.

The app's standard calculator functionality includes permanent storage of calculation history, sorting, annotations, favorites, summing up history, copy/paste results, customization of arithmetic operation key colors, and easy switching between light and dark interface modes.