CALCU Stylish Basic Calculator: Smart Scientific Math Tool

CALCU is a free scientific calculator with customizable themes, equation solver, derivative/integral calculations, and calculation history for advanced math.

About CALCU Stylish Basic Calculator

CALCU Stylish Basic Calculator is a powerful scientific and basic calculator app that handles everything from simple arithmetic to complex mathematical equations. It delivers an exceptional user experience by combining rigorous mathematical functions with stunning visual customization options. With over 227,000 reviews and a 4.8-star rating, CALCU dominates Android calculator preferences through seamless design and accessibility.

Designed for students, engineers, teachers, and mathematics professionals, CALCU solves the problem of boring default calculators by offering 20+ customizable themes, derivative and integral calculations, equation solving, and full calculation history with annotatable notes. The app supports 28 languages, works offline completely, and provides gesture-based navigation that makes complex calculations faster and more intuitive than system calculators.

Features Of CALCU Stylish Basic Calculator

  • Basic arithmetic operations with addition, subtraction, multiplication, and division, precise to multiple decimal places
  • Scientific functions including trigonometry (sin, cos, tan), inverse functions, and hyperbolic operations for advanced math
  • Calculation history with complete equation display allowing users to review and reuse previous results instantly
  • Memory functions (M+, M-, MR, MC) for storing intermediate values during complex multi-step problems
  • Equation solver for linear and polynomial equations enabling variable value determination automatically
  • Derivative and integral calculations supporting calculus problems with numerical computation methods
  • Customizable visual themes with 20+ built-in designs covering classic, minimal, colorful, and dark aesthetic styles
  • Landscape mode with expanded scientific keyboard providing professional calculator experience on tablets
  • Logarithmic operations including natural logarithm (ln), common logarithm (log), and binary logarithm (log2)
  • Factorial, exponentiation, and root calculations (square root, cubic root, nth root) for mathematical completeness

Premium Features in the Paid Plan

  • Unlimited custom theme creation using RGB color sliders and gradient editors for personalized aesthetics
  • Ad-free experience removing all advertisements from calculator interface for uninterrupted workflows
  • Unlimited theme storage with the ability to create and save 50+ custom color schemes
  • Enhanced customization options for button colors, display fonts, and background patterns
  • Priority cloud backup and synchronization of calculation history across multiple devices
  • Premium support with dedicated email assistance and faster response times
  • Exclusive themes updated monthly featuring seasonal designs and limited-edition color collections
  • Calculation history export in multiple formats (PDF, CSV, text) for easy documentation and reporting

Free / Premium $9.99-$15 annual

Free vs Premium Comparison

Feature Free Premium
Core Calculator Functions All basic and scientific functions available Same features; premium only unlocks aesthetic customization
Calculation History 100 calculation limit in history log Unlimited calculation history with cloud backup
Themes Available 20+ built-in themes 20+ built-in + unlimited custom theme creation
Advertisements Non-intrusive ads during use Completely ad-free interface
Custom Theme Design Not available Full RGB editor and gradient designer
Equation Solver Standard equation solving Advanced equation solver with more complex polynomial support
Theme Storage Limit 5 custom theme save slots Unlimited theme storage and synchronization
Export & Sharing Manual copy/paste to other apps One-click export to PDF, CSV, and Google Drive

Frequently Asked Questions

How do I access the scientific calculator functions in CALCU?

Swipe up from the number keypad to reveal trigonometric, logarithmic, and advanced functions. In landscape mode on tablets, scientific buttons display automatically. Swipe down to return to basic arithmetic operations. This gesture system keeps the interface clean while maintaining full functionality access.

Does CALCU have a subscription model, and can I use it without paying?

CALCU is completely free with all mathematical functions available. Premium ($9.99-$15 annually) only unlocks aesthetic features like custom theme creation and ad-free experience. No paywall blocks core calculations. Subscriptions auto-renew unless cancelled 24 hours before cycle end in Google Play Settings.

Is my calculation history saved privately, and can I delete it?

Calculation history stores locally on your device with TLS encryption during cloud sync (Premium). You can clear history anytime through app settings; individual results delete via swipe gestures. Developer states no data shares with third parties. However, app activity metrics cannot be deleted per Google Play policies.

Can I use CALCU on my iPhone or iPad?

CALCU is Android-only with no official iOS version available despite user requests. iPhone/iPad users should try Calculator+, Photomath, or RealCalc alternatives offering similar scientific functions and customization. The developer has not announced iOS expansion plans as of December 2025.

How do I solve equations or use the derivative calculator in CALCU?

Access the equation solver in Scientific mode by locating the solver button (displays as 'x='). Enter your equation and CALCU returns variable values instantly. For derivatives/integrals, use the corresponding buttons in Scientific view, entering function and variable. Results display with full equation context visible.

What's the difference between CALCU and other scientific calculators like Photomath or RealCalc?

CALCU prioritizes visual customization with 20+ themes and custom design tools (Premium). Photomath focuses on homework help through camera photo recognition. RealCalc targets advanced users with RPN notation support. CALCU balances aesthetics and functionality; choose Photomath for solutions, RealCalc for RPN, CALCU for beauty-plus-power.