Citizen Calc: Business & GST

Citizen Calc: Business & GST brings the trusted precision, tactile feel, and comprehensive functionality of a classic desktop electronic calculator to your iPhone and iPad. Designed specifically for business owners, traders, accountants, shopkeepers, students, and finance professionals, it combines authentic desktop calculator operations with modern digital speed. Whether you are calculating commercial tax rates, balancing daily sales ledgers, calculating wholesale markups, or reviewing long invoice addition steps, Citizen Calc provides an intuitive and reliable computational workspace. -------------------------------------------------- KEY FEATURES & CAPABILITIES -------------------------------------------------- 1. COMPLETE CHECK & CORRECT AUDIT SYSTEM * 120-Step Review: Review every step of your long calculations using the dedicated Check Left and Check Right buttons. * Step-by-Step Editing: Correct numbers or operators on the fly without re-typing the entire sequence. * Auto Check Playback: Automatically replay calculations at the touch of a button to verify invoice accuracy quickly. 2. DUAL GST & TAX CALCULATION SHORTCUTS * Instant +GST and -GST calculation buttons for statutory commercial tax rates. * Built-in 5 customizable tax preset buttons (Default: +3%, +5%, +12%, +18%, +28%). * Edit GST tax rates anytime to match your local regional tax slabs or custom business margins. * Direct display of Net Amount, GST Amount, and Gross Total values. 3. DEDICATED BUSINESS & FINANCIAL FUNCTIONS * Grand Total (GT): Automatically accumulates sum totals of multiple calculations with single-touch retrieval. * Mark Up (MU): Calculate profit margins, selling prices, and commercial markups effortlessly. * Memory Registers: Standard M+, M-, and MRC (Memory Recall / Memory Clear) functions. * Square Root & Percentage: Quick dedicated keys for routine financial arithmetic. * Double Zero (00) and Backspace (Delete): Rapid data entry tailored for billing and accounting. 4. AUTHENTIC RETRO LCD & SOUND DESIGN * Realistic digital segment LCD screen with active calculation step indicators (CRT, AUTO, GT, M). * Realistic mechanical acoustic key-click audio. * Integrated iOS Taptic Engine haptic vibration feedback for precise, tactile typing confidence. * Independent audio sound and vibration toggles in Settings. 5. 10 REALISTIC VISUAL THEMES * Choose from 10 high-contrast, authentic desktop calculator styles: Classic, Graphite, Rose, Gold, Cocoa, Ember, Ocean, Forest, Violet, and Midnight. * Tailored for daytime clarity and dark-room readability. 6. FULL CALCULATION HISTORY * Automatic saving of your calculation expressions and final totals. * Search and filter through past calculations instantly. * Single-tap history deletion for complete data privacy. 7. QUICK CALC SPEED GAME * Built-in mental arithmetic training game to sharpen speed, accuracy, and calculation reflexes under time pressure.