Lokcal — Privacy-First Calorie Tracker

Android · iOS · Desktop · Web — all from one codebase.

Track calories in 10 seconds. No account. No cloud. No subscription. Your data never leaves your device.

Try in browser

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Lokcal runs natively on Android, iOS, Desktop, and Web — all from one codebase. No account. No subscription. No cloud. Log in seconds, check the graph, get on with your day.

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Features

Your data never leaves your device. No cloud, no account, no breach surface. Lokcal stores everything locally — there is nothing to take.

Food data that matches what you actually buy. Hundreds of common foods included out of the box. Add more by searching stores in the Netherlands, the US, Italy, and beyond. Open Food Facts covers everything else.

Your actual maintenance calories, not a generic formula. Lokcal watches your weight against your intake over time and works out your actual maintenance number — no questionnaire, no formula.

10 seconds to log a full meal. "Same as yesterday", leftovers, frequently used items, and barcode scanning mean that once a food is in your database, logging it is instant.

Also included: weight tracking · exercise logging · automatic nightly backups · data export · fully offline · no ads

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Download

• To be done — iOS
• To be done — Android
• Try in browser
• Desktop: see Building from Source below

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Building from Source

Prerequisites

• JDK 17+
• KDoctor to verify your environment
• local.properties in the project root with sdk.dir=/path/to/android/sdk

Android

./gradlew :androidApp:assembleDebug
# APK: androidApp/build/outputs/apk/debug/androidApp-debug.apk

Desktop (JVM)

./gradlew :shared:run
# Hot reload:
./gradlew :shared:hotRunJvm

iOS

Open iosApp/iosApp.xcodeproj in Xcode and run, or use the Kotlin Multiplatform plugin in Android Studio.

Web (Wasm)

./gradlew :shared:wasmJsBrowserDevelopmentRun --continue

Tests

./gradlew :shared:jvmTest                          # fast — use for most changes
./gradlew :androidApp:connectedDebugAndroidTest    # requires connected device
./gradlew :shared:iosSimulatorArm64Test            # iOS simulator

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Architecture

Built with Kotlin Multiplatform and Compose Multiplatform. All business logic, UI, and data storage live in :shared/commonMain and compile to all four targets.

:androidApp          — Android wrapper
:shared/commonMain   — All shared Kotlin: UI (Compose), ViewModels, Repositories, SQLDelight schema
:shared/androidMain  — Android platform actuals (HealthConnect, BackupManager, DriverFactory)
:shared/iosMain      — iOS platform actuals
:shared/jvmMain      — Desktop platform actuals
:shared/wasmJsMain   — Web platform actuals + landing page

Stack: Kotlin 2.2, Compose Multiplatform 1.9, SQLDelight 2.2, Ktor 3.3, kotlinx-coroutines/serialization/datetime, Coil, KScan (barcode)

See CLAUDE.md for build rules, test strategy, and contribution guidelines.

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Contributing

Issues and PRs are welcome. Open an issue to discuss before starting large changes. Contributions to commonMain benefit Android, iOS, Desktop, and Web simultaneously — the leverage of a shared codebase.