Calctan vs Secure Password Lock

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 no ads. KEY FEATURES 1. SMART FORMULA WORKSPACE • Direct Cursor Editing: Tap anywhere in your expression to fix numbers or operators instantly—no need to clear the expression and start over. • Live Syntax Validation: Real-time calculation preview with automatic balancing of parentheses as you type. • Fluid Multi-Line Display: Expressions scale dynamically so long 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 minimize floating-point rounding errors. • Built-in & Custom Constants: A library covering mathematics, physics, and chemistry, plus customizable slots for your own tax rates or business ratios. 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 track expenses, homework problems, or client totals. • Batch Operations: Select multiple past entries to instantly calculate a running total. • AirPrint & PDF Reports: Generate itemized, professional calculation sheets to share, save, or print directly. 4. DESIGNED FOR PRODUCTIVITY • Multitasking on iPad: Full support for Split View, Slide Over, external keyboards, and trackpads. • iCloud Synchronization: Keep your saved formulas, constants, and calculation history unified across iPhone and iPad. • Customizable & High-Contrast Themes: Handcrafted color palettes designed to minimize eye strain during long study or work sessions. • Private & Ad-Free: No tracking, no data collection, and no subscription is required to calculate. We do not collect your data; calculations stay on your device and, if enabled, sync privately through your personal iCloud account. PERFECT FOR: • STEM & College Students: Algebra, calculus, physics, and exam prep with clear, step-by-step editing. • Finance & Accounting: Tax prep, budgeting, invoices, and expense verification with itemized tapes. • Retail & Small Business: Quick customer totals, discount percentages, and printable calculation logs.

Secure Password Lock - Your Exclusive Password Manager Do you often get annoyed by forgetting passwords? Are you worried about your passwords being leaked or stolen? Do you want a secure, convenient, and beautiful password recording app? If your answer is yes, then you must try Secure Password Lock! Secure Password Lock is a professional password recording app that can help you easily manage and protect your various passwords. Whether it's social accounts, shopping websites, gaming platforms, or bank cards, emails, Wi-Fi, you can create and save your passwords in Secure Password Lock, so you can view and use them anytime and anywhere. Secure Password Lock has the following features: - Local storage, no user information collection. Your passwords are only saved on your device and will not be uploaded to any server, ensuring your privacy and security. - Support gesture app lock. You can set a gesture password to protect your app, preventing others from opening your Secure Password Lock. - Support face unlock and fingerprint unlock. If your device supports face recognition or fingerprint recognition, you can use these methods to quickly unlock your Secure Password Lock, more convenient and secure. - You can add pictures to display the recorded passwords. You can add a picture for each password, making your passwords more intuitive and interesting. - Support adding filters and cropping to pictures. You can edit the added pictures, add filters or crop them, making your pictures more beautiful and personalized. - Support custom password categories. You can create different password categories according to your needs, such as social, shopping, gaming, etc., making it easy for you to manage and find your passwords. - Support category management, allowing sorting and adding/deleting categories. You can manage the categories you create, adjust the order or add/delete categories, making your Secure Password Lock more tidy and clear. Secure Password Lock is a trustworthy password recording app that can free you from the trouble of forgetting passwords and let you enjoy a more secure and convenient digital life. Download it now!