Professional calculator

Calculator integrates multiple practical functions including arithmetic calculation, income tax calculation, unit conversion, 3D shape calculations, mortgage calculation, and kinship relationship calculation.
· Records complete calculation processes for easy reference, with comment insertion for bookkeeping
· Clear history log for instant access and reuse
· Built-in stylish skins with customizable themes
· Voice broadcast and keypress sounds enhance the calculation experience
[Basic Calculator]
Basic calculations, long expressions, fractions, and bracket operations with voice broadcast and keypad sounds. Outperforms system calculators.
[Income Tax Calculator]
Scientifically calculates tax based on pre-tax income, threshold, social insurance, housing fund, and other deductions.
[Unit Converter]
Supports conversions for:
Length | Mass | Area | Pressure | Speed | Internet Speed | Time | Power | Energy | Frequency | Fuel Consumption | Brightness
[3D Shape Calculator]
Calculations for: Cube, Cuboid, Cylinder, Cone, Pyramid, Prism, Frustum, Sphere, Torus, Cylindrical Ring, Regular Hexagonal Prism
Properties include: Length, Width, Height, Perimeter, Volume, Capacity, Area, Surface Area, Base Area, Radius, Diameter, Circle Area, Circumference, Generatrix Length, Edge Length, Platform Height
[Kinship Calculator]
Instantly identifies relatives like aunts, uncles, and in-laws. Never misaddress family members again!
[History Records]
Auto-saved calculation logs for easy bookkeeping and data security.
[Memo Bookkeeping]
Add notes to track income/expense sources for every calculation.
[RMB Capitalization]
Converts numbers to Chinese RMB capital letters for easier invoicing and reimbursement.
[More Features]
· Reuse Results: Apply previous results directly in new calculations
· Edit/Delete: Modify any expression with highlighted results
· Copy: Copy single lines or full calculations for sharing
· Font Adjustment: Adjustable font sizes with elderly-friendly mode
· Dark/Light Theme: Eye-friendly modes for day/night use
· 12 Premium Skins: Customize any color scheme
· Corner Styles: Choose rounded or square interfaces
· Key Sounds: Multiple feedback tones to prevent mis-taps
· Voice Broadcast: Real-time voice confirmation of inputs
· Date Stamping: Automatic date tagging for traceability
· 10-Decimal Precision: High-accuracy calculations
· Rounding Options: Round up/down or use standard rounding
[Contact Us]
QQ: 1260269149
[Subscription]
Plans: Monthly (1 month), Quarterly (3 months), Annual (12 months)
Pricing:
Monthly: $1.99/month
Quarterly: $5.99//quarter
Annual: $ 9.99/year
Payment: Charged to iTunes account upon confirmation
Auto-renewal: iTunes charges 24 hours before expiration
Benefits: All skins + Ad-free experience
Cancellation: Disable auto-renewal ≥24 hours before renewal
Management: Modify subscriptions via account settings
[Legal]
Privacy Policy: https://sites.google.com/view/xiaofangjisuan/yingsi
Terms of Service: https://sites.google.com/view/xiaofangjisuan/tiaokuan