Bistro Split

Develop a user-friendly tip calculator and bill splitting application named Bistro Split, designed to serve dining groups of all sizes, from small intimate gatherings to large party groups. The core functionality shall include a clear, intuitive main input interface where users first enter the full bill total amount, then select a desired tip percentage either through pre-set quick-select options covering common tipping ranges or a free custom input field for personalized tip values. Users will then input the number of people sharing the bill to complete the core input parameters. The app must feature real-time dynamic calculation that updates three key results instantly as users type or adjust any input value: the calculated tip amount, the final total bill including the tip, and the exact equal share each person in the group needs to pay. Build an automatically saved history ledger function that stores all past calculation records, allowing users to easily reference any previous bill splitting entries at any time. Add a tap-to-view interaction for all saved history entries, where tapping any stored calculation will open a detailed full receipt breakdown page that clearly displays both per-person payment details and overall total amount data for that specific bill. Prioritize smooth responsive interaction across common mobile device screen sizes, ensure all calculation logic is accurate and free of rounding errors, and optimize interface readability to let users view and input information clearly during active dining scenarios.