Xmart Calculator Pro vs Calctan

Let's look at some simple questions: Question 1: James can make $200 per day, what would be his annual income ( He works 5 days a week, 48 weeks per year) ? This is easy, just enter an expression as this in Xmart Calculator: 200 x 5 x 48 Question 2: How many times of tapping a button to calculate his annual income? 8 times on a normal calculator, 7 times on Xmart Calculator (you don't need to tap the '=' button). Question 3: What if his day rate is $320, $400, $500...? Well, very similar: 320 x 5 x 48; 400 x 5 x 48; 500 x 5 x 48... What's the problem? With a normal calculator, we have to enter the same buttons 'x 5 x 48' very time when the only value changes is just the day rate. Is there any way to just enter the day rate and the result will update automatically? With Xmart Calculator, YES! You can define a Algebra function like this: "IncomeByDay(X) = X x 5 x 48" Then you can just select the function and enter the value for 'X' and the result will update straight away! To get James annual income, you just need to tap buttons 4 times. -- End of questions -- Xmart Calculator is appreciated as an intelligent, programmable and expandable calculator based on text expression. In addition to most of the common and scientific functions, users can also define personal functions. All calculations are step-by-step traceable. **Quick start: * There is no '=' button in this calculator app, it will calculate and show result as soon as the expression is updated. * Swipe up/down to hide/show the history records. * Swipe left and right to hide/show the scientific/math functions. **Main feature: * Custom functions: user can define any algebra functions with up to 9 parameters. * Use a custom function in the main expression or play with it separately. * Calculate and show result instantly when the input is updated. * Most common scientific & math functions are included. * Save calculation to history * Review & Recall history results or expressions * Name/label a history item meaningfully * Record and show step by step details of the calculation * Share history with friends * Fast mortgage calculator is included **Additional features * Support Apple Watch & iMessage * Auto save: turn ON/OFF or set a custom timer for saving results automatically * Colours, layouts and fonts are configurable, you can design your own calculator. * Turn ON/OFF button sounds. * Select button sound from 6 different options

Calctan is a high-precision scientific and financial tape calculator designed for iPhone and iPad. Built for students, engineers, accountants, and business professionals, Calctan bridges the gap between scientific computing and practical everyday finance. Edit complex formulas with ease, audit running totals on a printable tape, and enjoy a distraction-free workspace with zero ads. KEY FEATURES 1. SMART FORMULA WORKSPACE • Tap-to-Edit Cursor: Tap anywhere in your expression to fix numbers, operators, or parentheses instantly—no need to clear your work and start over. • Dedicated Undo & Redo: Step backward and forward through previous edits effortlessly with intuitive controls. • Live Syntax & Instant Preview: Real-time calculation results with automatic balancing of parentheses as you type. • Fluid Multi-Line Display: Dynamic scaling ensures long, complex formulas are never cut off. 2. ADVANCED SCIENTIFIC ENGINE • Complete Math Suite: Trigonometric functions (radians/degrees, inverse, hyperbolic), factorials, permutations, powers, roots, modulo, and logarithms. • True Order of Operations: Context-aware order of operations with high-precision calculations that eliminate floating-point rounding errors. • Built-in & Custom Constants: Standard libraries for mathematics, physics, and chemistry, plus custom slots for tax rates, currency multipliers, or business margins. 3. ACCOUNTING TAPE & REPORT EXPORT • Auditable Calculation History: Every calculation is automatically logged on a persistent digital paper tape. • Label & Categorize: Add custom notes, tags, and project labels to organize expenses, homework sets, or client billing. • Batch Operations: Select multiple past entries to calculate running totals on the fly. • AirPrint & PDF Export: Generate clean, itemized calculation sheets ready to print, save, or share. 4. DESIGNED FOR PRODUCTIVITY • Haptic Feedback & Precision Control: Smooth cursor dragging and tactile feedback optimized for high-speed input. • iPad Multitasking: Full support for Split View, Slide Over, external keyboards, and trackpads. • Seamless iCloud Sync: Keep your saved formulas, custom constants, and calculation tapes synchronized across all your devices. • High-Contrast Themes: Handcrafted color palettes engineered to minimize eye strain during long study or work sessions. • Private & Ad-Free: Zero tracking, no telemetry, and no ads. Your calculations remain strictly on your device and private iCloud storage. PERFECT FOR: • STEM & College Students: Algebra, calculus, physics, and lab assignments with clear, step-by-step editing. • Finance & Accounting: Tax prep, budgeting, invoice balancing, and expense verification with itemized logs. • Retail & Small Business: Fast customer totals, margin/discount calculations, and printable audit trails.