Calca vs Due2

Calca is a powerful symbolic calculator that gives you instant answers as you type. It solves equations and simplifies complex expressions - it's a computer algebra system in your pocket! It's also a rich Markdown text editor so that you can explain your ideas alongside your calculations. Calca is perfect for professionals and students - anyone who works with numbers and equations. Variables and functions can be created with only a few keystrokes and can be manipulated with a rich library of operators and functions. Calca updates as you type - just like a spreadsheet. You can declare variables, edit their values and watch everything update before your eyes. Since everything is calculated on the device - no network needed - you get answers instantaneously. All calculations are stored as plain text so you can easily share them with other editors and move them from device to device. Calca has been designed to work with iCloud documents so all your devices can access your calculations - you'll always have the latest files ready for viewing and editing. Calca comes with a suite of examples to help you get started covering topics from home mortgages to kinetics. All these examples are fully explained within Calca itself. Are you still using a desktop calculator? Are you using the calculator with the giant buttons that came with your OS? Computers are much more capable than doing simple one-line arithmetic - put your machine to work with Calca! Calculation Features: • Variables `x = 42` • Functions `f(c) = 9/5*c + 32` and even recursive functions • Units `42 mph in kmph` and currency `¥599 in $` • Solves equations (`x + 2x + 4x = 42`, what is x?) • Matrices with inverses so you can solve linear equations • Sum, prod, map, and reduce operations on lists, matrices, and ranges • Trigonometry and complex numbers • Derivatives of functions • Logic operations and if statements • Binary math (& and |) and support for binary and hex number (`0xA9` and `0b1010`) • Keeps track of units (m, s, m/s, m/s^2, etc.) so you can verify your equations as you compute Please visit http://calca.io to see lots of examples. Thank you for looking!

Ask AI to create schedules, grab items shared by others, and manage deadlines together in groups. Your data stays encrypted, syncs across phone, watch, and PC, and connects with other AI tools via CLI. [Key Features] - Dashboard: see urgent / this month / upcoming at a glance - Easy Mode: large text and simplified screens for everyone - 4-digit PIN: lock with just 4 digits instead of a complex password - AI Search: find items in natural language; AI auto-adds deadlines - AI Goal Planner: let AI generate a schedule to reach your goals - AI extraction: paste text or snap a photo — AI finds deadlines and adds them - Push alerts at your chosen timing: D-30, D-7, D-1, D-day, and more - Recurring schedules: auto-renew monthly or yearly, zero re-entry - Group sharing: create multiple groups, share with family or team, transfer ownership - Group chat: discuss schedules in real time with E2EE group chat - Public packs: browse and follow schedule packs by other users, add to your own - Calendar import: pull events from your device calendar and turn them into deadlines - Apple Watch: check deadlines on your wrist, see urgent count via complications, real-time sync and offline support - E2E encryption: memos are encrypted on-device; even Due2 servers cannot read them - TTS voice briefing: listen to your dashboard summary or let notifications read themselves - CLI / AI integration: add items from the terminal; let AI agents extract deadlines automatically - Keyboard shortcuts: quick actions on desktop - Multi-platform: sync across iPhone, macOS, and Windows - Biometric lock: protect your data with Face ID / Touch ID / fingerprint - Dark mode / Korean, English, and Japanese [Pricing] - Free: up to 10 active items, 5 group shared items - Plus: $9.99/year, up to 300 active items, 30 group shared items - Pro: $19.99/year, up to 1,000 active items, 100 group shared items Privacy Policy: https://due2.app/privacy Terms of Service: https://due2.app/terms Account & Data Deletion: https://due2.app/delete-account Support: https://due2.app/support