I need a straightforward Flutter application that bundles three tools—Age Calculator, Loan Calculator, and EMI Calculator—under one clean, minimalist interface. The goal is to compile an Android-ready build that I can upload to Google Play Console without extra steps or feature bloat. Core requirements • Each calculator must be accurate, quick to load, and free of dependencies that could break during review. • The UI should follow a simple Material-style theme with no flashy graphics—just clear typography, intuitive inputs, and concise results. • No user accounts, local storage, or cloud sync are necessary; all calculations happen client-side. Deliverables I expect 1. Complete Flutter source code, clearly commented and structured for future tweaks. 2. Release-ready .aab file signed with a test keystore plus instructions for re-signing with my own keys. 3. Store assets: app icon (512 × 512 px), feature graphic (1024 × 500 px), and at least four screenshots. 4. Brief README covering build/run steps and any package versions used. I’ll test the results against standard formulas for each calculator, confirm that the app passes Play Console pre-launch checks, and green-light final payment once everything installs and functions smoothly on Android 8+. If you’ve shipped similar lightweight utilities before, mention them so I can review.