Fafnir

A small, personal expense tracker for iOS. Log expenses in a couple of taps, set budgets per category or for the whole month, and see at a glance how the month is going. Everything lives in a local SQLite database on the device — no accounts, no sync, no network.

Amounts are stored as integer øre and displayed in NOK.

Features

• Home — monthly overview with a summary card and per-category cards showing spend vs. budget. Tap a category to quick-log an expense; long-press to edit it, set its budget, view its expenses, or delete it. Browse back through previous months.
• Ledger — the full expense list, with editing.
• Wishlist — things you're considering buying, filed under a category.
• Subs — recurring subscriptions (monthly or yearly), with monthly-equivalent cost.
• Categories — user-defined, with optional emoji icon and color, one level of subcategories, and manual reordering. Deleting a category that still has expenses, subscriptions, or wishlist items archives it instead of destroying history.
• Budgets — a default budget per category plus per-month overrides, and an overall month budget with the same default/override scheme.

Tech

• SwiftUI, single-module app, no view models — screens observe the database directly
• GRDB for SQLite access; ValueObservation streams keep every screen live-updated as data changes
• Schema is created and seeded via DatabaseMigrator migrations (in DEBUG the database is erased on schema change, so migrations can be edited freely during development)

Project layout

Fafnir/
├── FafnirApp.swift          # entry point, injects database + router
├── ContentView.swift        # tab bar
├── Router.swift             # tab selection & cross-tab navigation
├── Database/
│   ├── AppDatabase.swift    # connection, migrations, seed data, write API
│   ├── Models.swift         # Category, Expense, Budget, Subscription, …
│   ├── Queries.swift        # read queries used by the screens
│   └── AppDatabase+Environment.swift
├── Screens/                 # HomeView, LedgerView, WishlistView, SubscriptionsView
├── Sheets/                  # quick entry, category form, budget, reorder
└── Components/              # shared views & helpers

Running

Open Fafnir.xcodeproj in Xcode and run the Fafnir scheme (iOS 27+). GRDB is resolved automatically via Swift Package Manager. The database file is created under Application Support (Database/fafnir.sqlite); in DEBUG builds its path is printed to the console on launch.