Offline iOS Budget App Development

I need a clean, fully-offline budget app built for iOS that users can download, open, and start using immediately—no sign-up screens or bank connections, yet all their data must remain safely stored each time they relaunch the app.

Core experience
• Expense tracking and editable spending categories
• Simple budget planning with monthly or custom periods
A heads-up incoming expenses view to make sure you have enough money when needed.
• Instant financial reports (totals, category breakdowns, and monthly comparisons)
• A “what-if” savings visualizer: users enter an amount and frequency, and a line graph shows projected growth over time

Key constraints
• Works entirely on-device; Core Data or a similarly robust local solution should handle persistence.
• The interface should feel native to iOS 17+ (SwiftUI preferred), with light and dark modes.
• No external APIs, user accounts, or cloud sync for the first release.

Deliverables
1. Xcode project with well-commented Swift/SwiftUI code
2. App icon set, launch screens, and App Store screenshots (portrait, iPhone sizes)
3. TestFlight-ready build plus a short step-by-step guide that walks me through:
– Creating the App Store listing
– Setting up in-app purchases if I decide on a paid upgrade later
– Passing App Review (privacy policy, data storage disclosure, etc.)
4. One-page developer handover that outlines future extension points (e.g., CSV export, notifications)

Acceptance criteria
• Installation via TestFlight preserves data after force-quit and device restart.
• Savings visualizer updates instantly when inputs change and renders smoothly at 60 fps on an iPhone 12.
• All screens meet Apple’s Human Interface Guidelines and pass VoiceOver basic checks.

If this scope aligns with your skill set, let’s move forward and set milestones for the prototype, UI polish, and App Store submission.