DocShelf vs TriTab Calc

DocShelf — Documents Simplified Keep every document you own safe, searchable, and beautifully organized — entirely on your device. No cloud upload. No subscription. No ads. Just your files, always with you. WHY DOCSHELF? Most document apps quietly upload your files to a cloud server. DocShelf is different. Everything stays 100% local on your iPhone. Your contracts, medical records, tax returns, and personal scans never leave your device unless you choose to share them. SCAN & CAPTURE Turn your iPhone into a powerful document scanner. Point your camera at any document — receipts, contracts, handwritten notes, business cards, or multi-page reports — and DocShelf captures it instantly. Smart edge detection automatically crops, straightens, and enhances each page so every scan looks sharp and professional. • Multi-page scanning in a single session • Auto edge detection and perspective correction • Contrast enhancement for clear, readable results • Save as PDF or high-resolution image ORGANIZE EVERYTHING No more hunting through a single giant folder. DocShelf gives you a clean, intuitive system to keep every document exactly where it belongs. • Create unlimited folders and subfolders • Tag documents across multiple categories • Full-text search across all your files instantly • Sort by name, date, size, or custom order • Color-code folders for fast visual navigation EVERY FILE TYPE — ONE APP Import from any app on your phone using the system Share Sheet. DocShelf handles them all: • PDFs — view, annotate, and share • Images — JPG, PNG, HEIC from your camera roll • Documents — Word, Excel, PowerPoint, and more • Audio and video files • Any file your iPhone can receive PRIVATE BY DESIGN DocShelf was built from day one with privacy as a core principle — not an afterthought. • 100% offline — no internet connection required, ever • No cloud sync, no remote storage, no server • No analytics, no crash reporting that uploads your data • No third-party advertising SDKs • Full functionality on a plane, underground, or anywhere without signal VIEW & SHARE Read your documents beautifully inside DocShelf without opening another app. When you're ready to share, it's frictionless — AirDrop, Mail, Messages, or any app on your phone. WHO IS DOCSHELF FOR? → Students organizing lecture notes, assignments, and research papers → Professionals managing contracts, invoices, and client documents → Families storing medical records, insurance papers, and important IDs → Freelancers tracking receipts, tax documents, and signed agreements → Anyone who wants a private, always-available digital filing cabinet Download DocShelf and take back control of your documents today.

A three-tab calculator that lets you keep multiple calculations going at the same time. The A, B, and C tabs each work as an independent calculator. Switch between them without losing your current expression or result. Use A for the pre-tax price, B for the tax-inclusive total, and C for the discounted price—all without writing down intermediate numbers or clearing your work. One purchase unlocks everything. No ads, no in-app purchases, no subscriptions. ■ Three Independent Calculators Switch between A, B, and C with one tap. Each tab keeps its own expression and result, so you can work on three calculations in parallel. ■ Compare All Three See the total of all three tabs and the difference between the highest and lowest at a glance. ■ Tax In and Out Add tax with one tap, or work back from a tax-inclusive price to the pre-tax amount. Set any tax rate in Settings. ■ Split the Bill Enter a total and the number of people to get the amount per person, with optional rounding up. ■ History, Copy and Undo Each tab keeps its own history. Tap an entry to copy its result. Tap the display to copy or paste, touch and hold to clear. Undo and redo are supported. ■ Essential Calculator Functions Basic arithmetic plus square root (√), square (x²), percentages (%), sign change (±), parentheses, and a 00 key. ■ Easy on the Eyes Choose from four themes—Pastel, High contrast, Dark, and Night—and turn on Large text when you need it. ■ Four Languages English, Japanese, Simplified Chinese, and Traditional Chinese. The app follows your device language automatically. ■ Perfect For • Checking estimates and invoices • Comparing pre-tax, tax-inclusive, and discounted prices • Calculating sales tax and shopping discounts • Splitting bills and calculating per-person costs • Comparing unit prices • Adding up inventory and quantities ■ Privacy Your calculation history and settings are stored only on your device. No account is needed, and the app does not collect personal information or send your data to external servers.