Simple. Fast.
Precise.
The calculator that works the way you do. Clean interface, instant results, and the power to handle any calculation.
Try It NowAs a Data Engineer, I need to define the database schema for storing calculation history, including fields for operation, operands, result, and timestamp.
As a Backend Developer, I need to implement the authentication flow using JWT for secure access to the calculator application.
As a frontend developer, implement the CalculatorHero section to demonstrate calculator functionality through a continuous 2D animated loop. Use `motion/react` to animate number entry, operation transitions, and clear animations with spring physics effects. Ensure the animation cycles every 8 seconds, emphasizing simplicity and efficiency. Include a headline and subheading to introduce the calculator. Acceptance criteria: The CalculatorHero section must render exactly once on the Calculator page. It should feature smooth animations for number input, operations, and results, with a clear action animation. The design must match the provided CSS, maintaining the theme and layout. No backend integration is required for this section. Access is shared with all personas. Page access: shared by all personas (User). This is verification context and does not request role-specific implementation.
As a frontend developer, implement the Footer section to provide branding and copyright information. Include the brand icon, name, tagline, and current year. Ensure the design matches the provided CSS, maintaining the theme and layout. Acceptance criteria: The Footer must render exactly once on the Calculator page. It should display the brand icon, name, tagline, and copyright text. The design must match the provided CSS. No backend integration is required for this section. Access is shared with all personas. Page access: shared by all personas (User). This is verification context and does not request role-specific implementation.
As a frontend developer, implement the Navbar section to provide navigation and branding. Include a brand icon, name, and a toggleable menu for navigation links. Ensure the design matches the provided CSS, maintaining the theme and layout. Acceptance criteria: The Navbar must render exactly once on the Calculator page. It should display the brand icon, name, and a toggleable menu with links. The design must match the provided CSS. No backend integration is required for this section. Access is shared with all personas. Page access: shared by all personas (User). This is verification context and does not request role-specific implementation.
As a Backend Developer, I need to implement an API that performs basic arithmetic operations and stores the results in the database for the User persona.
As a Backend Developer, implement an API endpoint to retrieve calculation history for the User persona. This API should support fetching past calculations stored in the database, including operation, operands, result, and timestamp. Acceptance criteria: The API must return a list of calculations with all relevant fields. It should handle pagination and filtering by date range. Ensure secure access using JWT authentication.
As a Full Stack Developer, I need to set up an API client service in the frontend to interact with the calculation API for performing operations.
As a frontend developer, implement the CalculatorInterface section to manage calculator input, operations, and state. This includes a digital display, input buttons (0-9, decimal), operation buttons, equals button, clear button, and an extended function button for API-driven operations. Ensure tactile feedback with shadow effects and hover animations. Handle error messages and animate result displays. Acceptance criteria: The CalculatorInterface must render exactly once on the Calculator page. It should support all arithmetic operations, clear functionality, and API-driven extended functions. The design must match the provided CSS, maintaining responsive layout. Integrate with the Calculation API for extended functions. Access is shared with all personas. Page access: shared by all personas (User). This is verification context and does not request role-specific implementation.
As a QA Engineer, create unit and integration tests for the Calculation API to ensure it performs arithmetic operations correctly and stores results in the database. Acceptance criteria: Tests must cover all arithmetic operations, error handling, and database persistence. Ensure tests run successfully in CI/CD pipeline.
As a Tech Lead, verify the end-to-end integration between the Calculator frontend implementation and the Calculation API. Ensure data flows correctly, API responses are handled properly in the UI, and all interactions work as expected.

The calculator that works the way you do. Clean interface, instant results, and the power to handle any calculation.
Try It Now
The calculator that works the way you do. Clean interface, instant results, and the power to handle any calculation.
Try It Now
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