Sumbox Calc: 30+ Daily Tools

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Sumbox: all your everyday math, in one box. A carefully built calculator plus 30+ handy tools. All calculation tools are free, with no ads and no sign-up. Calculation history stays on your device. Sumbox supports English, Simplified Chinese, and Traditional Chinese, following your device language. CALCULATOR • Basic and Scientific modes, portrait and landscape, and a distraction-free Focus Mode • Decimal-exact arithmetic: 0.1 + 0.2 = 0.3 • Percent, repeated equals, automatic closing parentheses, and implicit multiplication • Up to 15 significant digits, thousands separators, and readable large numbers • Memory keys and reusable calculation history 30+ TOOLS • Conversion: daily reference rates for 19 currencies with offline caching; 12 categories of units, including traditional Chinese units • Everyday: Chinese Family Titles with pinyin and English explanations, discounts, bill splitting, tips, unit-price comparisons, dates, age, and random numbers • Finance: RMB in Chinese Numerals, China Income Tax, mortgages, compound growth, savings goals, and installment APR • Health & Travel: BMI, running pace, and fuel costs • Math: percentages, percent change, circle area, and right triangles • Developer: hashes and HMAC, number bases and two’s complement, Base64, timestamps, passwords, and UUIDs YOUR CALCULATOR, YOUR LOOK Mint and Clear Contrast are always free. Six premium themes bring distinct colors, key shapes, digit fonts, key sounds, and matching app icons. Try on any theme first. Unlock All Themes is a one-time purchase with Family Sharing and includes future themes. HISTORY STAYS ON YOUR DEVICE No accounts, ads, analytics, or tracking. Delete calculation history at any time. Currency requests send currency codes, never entered amounts. Optional update checks request public app/version information from Apple and can be disabled in Settings. Exchange rates are reference rates; your bank or platform’s quote applies. Financial calculations are estimates, not financial advice. China Income Tax follows China mainland resident individual comprehensive-income rules and is not tax advice. BMI follows the Chinese adult standard (WS/T 428) and is not a medical diagnosis. Privacy Policy: https://suanhe.timesoria.com/en/privacy/ Terms of Use: https://suanhe.timesoria.com/en/terms/Read more

Sumbox: all your everyday math, in one box. A carefully built calculator plus 30+ handy tools. All calculation tools are free, with no ads and no sign-up. Calculation history stays on your device. Sumbox supports English, Simplified Chinese, and Traditional Chinese, following your device language. CALCULATOR • Basic and Scientific modes, portrait and landscape, and a distraction-free Focus Mode • Decimal-exact arithmetic: 0.1 + 0.2 = 0.3 • Percent, repeated equals, automatic closing parentheses, and implicit multiplication • Up to 15 significant digits, thousands separators, and readable large numbers • Memory keys and reusable calculation history 30+ TOOLS • Conversion: daily reference rates for 19 currencies with offline caching; 12 categories of units, including traditional Chinese units • Everyday: Chinese Family Titles with pinyin and English explanations, discounts, bill splitting, tips, unit-price comparisons, dates, age, and random numbers • Finance: RMB in Chinese Numerals, China Income Tax, mortgages, compound growth, savings goals, and installment APR • Health & Travel: BMI, running pace, and fuel costs • Math: percentages, percent change, circle area, and right triangles • Developer: hashes and HMAC, number bases and two’s complement, Base64, timestamps, passwords, and UUIDs YOUR CALCULATOR, YOUR LOOK Mint and Clear Contrast are always free. Six premium themes bring distinct colors, key shapes, digit fonts, key sounds, and matching app icons. Try on any theme first. Unlock All Themes is a one-time purchase with Family Sharing and includes future themes. HISTORY STAYS ON YOUR DEVICE No accounts, ads, analytics, or tracking. Delete calculation history at any time. Currency requests send currency codes, never entered amounts. Optional update checks request public app/version information from Apple and can be disabled in Settings. Exchange rates are reference rates; your bank or platform’s quote applies. Financial calculations are estimates, not financial advice. China Income Tax follows China mainland resident individual comprehensive-income rules and is not tax advice. BMI follows the Chinese adult standard (WS/T 428) and is not a medical diagnosis. Privacy Policy: https://suanhe.timesoria.com/en/privacy/ Terms of Use: https://suanhe.timesoria.com/en/terms/