Smart Scientific Calculator + - Lumos Educational App Store

All-in-one Calculator with voice, history for the iPhone and iPad. ◉ Advanced & Flexible Calculator+ ▸ Basic Calculator (+, -, x, ÷, %, (), ...) ▸ Scientific Calculator (e, pi, π, x!, Sin, Cos, Ln, ^, √, log, Sin⁻¹, Cos⁻¹, …) ▸ Calculation history (Show or hide) ▸ Visual input (Backspace key) ▸ Voice output (English, Spanish, Chinese, Japanese, Korean, ...) ▸ Modify expressions in real time ▸ Calculator Widget (for iOS 17.0+) ◉ Unit Converter ▸ Supports length, area, volume, speed, pressure, power, weight, temperature, energy, time, angle, density, force, torque, and the data capacity. ◉ Loan Calculator ▸ Calculate total interest, total payment based on loan principal and interest rate. ▸ Share the result to you friends or relatives. ◉ Currency Converter ▸ You can calculate currency exchange rate conversions, including dollar, euro, yen, yuan, etc. ◉ Fraction Calculator: ▸ You can calculate addition, subtraction, multiplication, and division of fractions. ▸ You can also perform calculations between decimals and fractions, Quickly and easily check children's fraction math problems. ◉ Percentage Calculator: ▸ You can easily calculate the percentage increase or decrease between numbers. ▸ You can also calculate what percentage one number is of another. ◉ Hexadecimal Converter: ▸ Enter a value, and generate a value which converted between binary, octal, decimal, and hexadecimal. ◉ BMI Calculator: ▸ Measure the body mass index (BMI), the basal metabolic rate (BMR), and body fat percentage (BFP). ▸ Save the BMI、BMR、BFP indicators as notes to keep track of your health status at any time. ◉ Date Calculator: ▸ Flexibly calculate the interval of a specific date or anniversary with accuracy to the month, week, day, hour, minute, and second. ◉ Relatives Calculator: ▸ Easily learn the names of Chinese relatives. ◉ Savings Calculator: ▸ Enter the deposit amount, interest rate and term and interest and final savings balance will be calculated. ◉ Income Tax Calculator ▸ Enter your pre-tax salary, additional deductions, and payment periods to calculate your final after-tax salary, personal income tax, medical insurance premiums, etc. ◉ Chinese financial capitalization: ▸ Enter the amount number, and the Chinese financial text corresponding to the amount can be generated. ◉ OTHER FEATURES: ▸ Portrait and landscape modes both available. ▸ Support Multitasking (iPad). ▸ Multiple skin themes. ▸ Keyboard vibration & Sound. ▸ Thousands separator. ▸ Adjustable number of decimal places. ▸ Support multi-language interaction: English, Spanish, French, Chinese, Japanese, Korean, Malay, Thai, Vietnamese... ▸ Other advanced functions... More features are being developed~ Please Come to download, just enjoy it ^_^ VIP Membership: Payment: Upon user confirmation and payment, it will be charged to the iTunes account. The monthly membership fee is 6 RMB, and the annual membership fee is 38 RMB. Renewal: The Apple iTunes account will be charged within 24 hours before the expiration date, and the subscription period will be extended accordingly upon successful payment. Canceling the Renewal: To cancel the renewal, please manually disable the auto-renewal function in the iTunes/Apple ID settings management at least 24 hours before the current subscription expires. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula Disclaimer: The developer of this application makes no warranties regarding the accuracy, reliability, or suitability of any calculation results or information provided by this application. The developer shall not be liable for any loss, whether direct or indirect, arising from the use of any calculation results or information provided by this application.