An iOS utility that helps you spend down prepaid/gift card balances by finding the best combination of items to buy (ideally leaving $0.00).
| Input (Balance + Items) | Optimization Report | Saved Lists |
|---|---|---|
 |
 |
 |
- Balance + items entry: Enter a remaining card balance and a list of items with prices to optimize against.
- Optimization report (multiple best options): Finds the closest spend (prefers exact zero) and lets you browse between multiple equally-optimal combinations.
- History + Saved Lists (SwiftData): Save past calculations for quick revisit, and store reusable item lists to apply back to new sessions.
- Language: Swift 5
- UI Framework: SwiftUI
- Architecture: MVVM (ObservableObject view models)
- Concurrency: Swift Concurrency (
Task+MainActor) - Data Persistence: SwiftData (Saved Lists + Calculation History)
- Networking: None
- Dependency Manager: Swift Package Manager (SPM) — no external dependencies
- Challenge: Enumerating and preserving multiple equally-optimal solutions (not just a single “best” result).
- Solution: Store all optimal selections and expose option browsing in the report UI to let users pick their preferred combination.
- Learning: Treating “best” as a set of solutions improves UX and makes history replay accurate and deterministic.
- iOS 26+
- Xcode 17+
- Clone the repository:
git clone https://github.com/keyursavalia/BalanceZero.git - Open
BalanceZero.xcodeproj - Select a simulator and press Cmd + R.
- Keyur Savalia - LinkedIn