A calmer, faster way to log body weight on Apple devices.
- One-tap entry from your Apple Watch (companion app + complication).
- One-glance latest weight on watchOS via Smart Stack/complication.
- History list + trend chart (iOS/iPadOS), plus edit/delete from history.
- All data lives in Apple Health on your device. Nothing leaves your device.
LogWeight is a SwiftUI app for iOS, iPadOS, and watchOS. It is not, and will never be, a separate weight database — the Health app is the source of truth.
Current state: iOS + iPadOS + watchOS are active. iOS/iPadOS use stepper-first entry with long-press acceleration and shared history/settings screens. watchOS supports Digital Crown input and refreshes its complication after saves.
| Phase | Status | Goal |
|---|---|---|
| 1 | Done | iOS app: stepper-primary entry, plain history list, settings, redaction, Core test suite, CI. |
| 2 | Done | watchOS app: Digital Crown + steppers + save; WKInterfaceDevice.play(.success); WidgetKit complication reading latest weight from HealthKit; shared HistoryView. |
| 3 | Done | iPadOS support in the iOS target with the same stepper-first flow and shared HistoryView / SettingsView. |
| 4 | In progress | Swift Charts in history, broadened XCUITests, accessibility audit docs, App Store metadata prep. |
- No analytics, no telemetry, no crash reporters.
- No social, no streaks, no nudges, no AI commentary.
- No third-party SDKs.
- No separate weight database in the app.
- No tvOS — HealthKit is unavailable on tvOS, so a build there cannot serve this app's purpose.
LogWeight/
├── project.yml # XcodeGen — single source of truth for the .xcodeproj
├── Packages/
│ └── LogWeightCore/ # Shared SPM package: models, HealthKitStore protocol, EntryState, formatting, logging
│ ├── Package.swift
│ ├── Sources/LogWeightCore/
│ └── Tests/LogWeightCoreTests/
├── App/
│ ├── iOS/ # iOS app target (embeds Watch app); includes Assets.xcassets / AppIcon
│ ├── Watch/ # watchOS companion app; includes Assets.xcassets / AppIcon
│ ├── WatchWidget/ # watchOS WidgetKit extension (complications)
│ ├── Shared/ # SwiftUI shared across platforms (e.g. `HistoryView`, `SettingsView`; watch excludes `SettingsView`)
│ ├── iOSScreenshots/ # iOS screenshot UI test target sources
│ └── iOSUITests/
├── docs/ # Architecture, HealthKit availability, Privacy, BuildAndDeploy
├── docs/jmat-reports/ # Multi-agent planning report (this commit)
└── .github/workflows/ci.yml
You need macOS 14+, Xcode 15+, and Swift 5.9+. The Xcode project file (LogWeight.xcodeproj) is generated from project.yml and is not committed.
brew install xcodegen
xcodegen generate
open LogWeight.xcodeprojRun swift test from Packages/LogWeightCore/ to execute the Core unit tests without Xcode.
See docs/BuildAndDeploy.md for full setup, signing, and TestFlight notes.
Phase 4 release docs:
docs/AccessibilityAudit.mddocs/AppStoreMetadata.mddocs/AppStoreMetadata.localized.mddocs/AppStoreReleaseChecklist.md
LogWeight handles GDPR Art. 9 special-category health data. See docs/Privacy.md for the full data-flow statement, lawful basis, and Privacy Manifest summary.
See docs/jmat-reports/2026-04-27-logweight-multiplatform-plan.md for the synthesised architecture and the constraints baked into the roadmap.