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Common Pods to SwiftPM Mapping

Reference for migrating popular CocoaPods dependencies to SwiftPM.

Firebase Suite

All Firebase products come from a single repository: https://github.com/firebase/firebase-ios-sdk.git

Key facts:

SPM product names match CocoaPods pod names (e.g., pod FirebaseAuth → product FirebaseAuth)
Exception: Beta products have a -Beta suffix in SPM (e.g., FirebaseAppDistribution-Beta)
The CocoaPods umbrella pod Firebase does not exist in SPM — import specific products
Platform requirements: iOS 15+, macOS 10.15+, tvOS 15+, watchOS 7+
Xcode: 16.2+

WARNING: Do not mix Firebase across CocoaPods and SPM. All Firebase products share a single repository and common transitive dependencies (gRPC, abseil, leveldb, BoringSSL, nanopb, etc.). If some Firebase pods remain in CocoaPods while others are added via SPM, the shared transitive dependencies get linked twice with conflicting symbols, causing dyld crashes at runtime (e.g., Symbol not found: _OBJC_CLASS_$_FIRFirestore). When migrating Firebase, move all Firebase pods to SPM at once — including Swift-only pods (FirebaseAI, FirebaseFunctions, FirebaseMLModelDownloader) that Kotlin cannot use directly. Add Swift-only pods as products entries without importedClangModules. After adding new products, re-run integrateLinkagePackage to regenerate the linkage Swift package.

Firebase SPM Products Reference

CocoaPods Pod	SPM Product	Platform	KMP Notes
FirebaseAnalytics	FirebaseAnalytics	All	ObjC classes: `FIRAnalytics`, `FIRApp`
FirebaseAuth	FirebaseAuth	All (partial on macOS/tvOS/watchOS)	ObjC classes: `FIRAuth`, `FIRUser`
FirebaseCore	FirebaseCore	All	ObjC class: `FIRApp`
FirebaseCrashlytics	FirebaseCrashlytics	All	ObjC class: `FIRCrashlytics`
FirebaseDatabase	FirebaseDatabase	All	importedClangModules: `FirebaseDatabaseInternal` — ObjC classes: `FIRDatabase`, `FIRDatabaseReference`
FirebaseFirestore	FirebaseFirestore	All	Special case — see below
FirebaseFunctions	FirebaseFunctions	All	Swift-only — no `importedClangModules` entry needed
FirebaseMessaging	FirebaseMessaging	All	ObjC classes: `FIRMessaging`
FirebaseRemoteConfig	FirebaseRemoteConfig	All	importedClangModules: `FirebaseRemoteConfigInternal` — ObjC class: `FIRRemoteConfig`
FirebaseStorage	FirebaseStorage	All	ObjC class: `FIRStorage`
FirebaseAppCheck	FirebaseAppCheck	All (watchOS 9+)	ObjC class: `FIRAppCheck`
FirebasePerformance	FirebasePerformance	iOS/tvOS only	ObjC class: `FIRPerformance`
FirebaseInAppMessaging	FirebaseInAppMessaging-Beta	iOS/tvOS only	`-Beta` suffix in SPM, importedClangModules: `FirebaseInAppMessagingInternal`
FirebaseAppDistribution	FirebaseAppDistribution-Beta	iOS only	Note `-Beta` suffix in SPM
FirebaseInstallations	FirebaseInstallations	All	ObjC class: `FIRInstallations`
FirebaseABTesting	(no SPM product)	All	Module-only: pulled transitively by RemoteConfig. List in `importedClangModules` only
FirebaseAILogic	FirebaseAI	All	Renamed in SPM. Swift-only — no `importedClangModules` entry needed
FirebaseMLModelDownloader	FirebaseMLModelDownloader	All	Swift-only — no `importedClangModules` entry needed

FirebaseAnalytics

// CocoaPods
pod("FirebaseAnalytics") { version = "12.5.0" }

// SwiftPM — use same version as pod
swiftPackage(
    url = "https://github.com/firebase/firebase-ios-sdk.git",
    version = "12.5.0",
    products = listOf("FirebaseAnalytics"),
)

Kotlin import:

import swiftPMImport.<group>.<module>.FIRAnalytics
import swiftPMImport.<group>.<module>.FIRApp

FirebaseAuth

// CocoaPods
pod("FirebaseAuth") { version = "12.5.0" }

// SwiftPM — use same version as pod
swiftPackage(
    url = "https://github.com/firebase/firebase-ios-sdk.git",
    version = "12.5.0",
    products = listOf("FirebaseAuth"),
)

Kotlin import:

import swiftPMImport.<group>.<module>.FIRAuth
import swiftPMImport.<group>.<module>.FIRUser

FirebaseDatabase

Database's Clang module name differs from its SPM product name. You must specify importedClangModules (requires typed API):

// CocoaPods
pod("FirebaseDatabase") { version = "12.5.0" }

// SwiftPM - Note the importedClangModules parameter (typed API required)
swiftPackage(
    url = url("https://github.com/firebase/firebase-ios-sdk.git"),
    version = from("12.5.0"),
    products = listOf(product("FirebaseDatabase")),
    importedClangModules = listOf("FirebaseDatabaseInternal"),
)

Kotlin import:

import swiftPMImport.<group>.<module>.FIRDatabase
import swiftPMImport.<group>.<module>.FIRDatabaseReference

FirebaseFirestore (Special Case)

Firestore's Clang module name differs from its SPM product name. You must specify importedClangModules (requires typed API):

// CocoaPods
pod("FirebaseFirestore") { version = "12.5.0" }

// SwiftPM - Note the importedClangModules parameter (typed API required)
swiftPackage(
    url = url("https://github.com/firebase/firebase-ios-sdk.git"),
    version = from("12.5.0"),
    products = listOf(product("FirebaseFirestore")),
    importedClangModules = listOf("FirebaseFirestoreInternal"),
)

Kotlin import:

import swiftPMImport.<group>.<module>.FIRFirestore
import swiftPMImport.<group>.<module>.FIRDocumentReference

Why is this needed? Firestore distributes as a binary xcframework. The internal Clang module exposed to Objective-C is named FirebaseFirestoreInternal, not FirebaseFirestore. Without importedClangModules, the KMP compiler cannot discover the Objective-C headers.

FirebaseCrashlytics

// CocoaPods
pod("FirebaseCrashlytics") { version = "12.5.0" }

// SwiftPM — use same version as pod
swiftPackage(
    url = "https://github.com/firebase/firebase-ios-sdk.git",
    version = "12.5.0",
    products = listOf("FirebaseCrashlytics"),
)

iOS project requirement: Crashlytics needs a dSYM upload run script in the Xcode build phases. After migration, add a "Run Script" phase at the END of build phases:

"${BUILD_DIR%/Build/*}/SourcePackages/checkouts/firebase-ios-sdk/Crashlytics/run"

With input files:

${DWARF_DSYM_FOLDER_PATH}/${DWARF_DSYM_FILE_NAME}
${DWARF_DSYM_FOLDER_PATH}/${DWARF_DSYM_FILE_NAME}/Contents/Resources/DWARF/${PRODUCT_NAME}
${DWARF_DSYM_FOLDER_PATH}/${DWARF_DSYM_FILE_NAME}/Contents/Info.plist
$(TARGET_BUILD_DIR)/$(UNLOCALIZED_RESOURCES_FOLDER_PATH)/GoogleService-Info.plist
$(TARGET_BUILD_DIR)/$(EXECUTABLE_PATH)

Also set Debug Information Format to DWARF with dSYM File for all build configurations.

Combined Firebase Example

When using multiple Firebase products, declare them in a single package. Set discoverClangModulesImplicitly = false — Firebase's transitive C++ dependencies (gRPC, abseil, leveldb, BoringSSL) contain Clang modules that fail cinterop. Explicitly list only the modules you need.

swiftPMDependencies {
    discoverClangModulesImplicitly = false

    // Combined Firebase requires typed API for importedClangModules control
    swiftPackage(
        url = url("https://github.com/firebase/firebase-ios-sdk.git"),
        version = from("12.5.0"),
        products = listOf(
            product("FirebaseAnalytics"),
            product("FirebaseAuth"),
            product("FirebaseDatabase"),
            product("FirebaseFirestore"),
            product("FirebaseCrashlytics"),
            product("FirebaseMessaging"),
            product("FirebaseRemoteConfig"),
            // Swift-only pods (products only, no importedClangModules):
            product("FirebaseAI"),
            product("FirebaseFunctions"),
        ),
        importedClangModules = listOf(
            "FirebaseAnalytics",
            "FirebaseAuth",
            "FirebaseCore",
            "FirebaseCrashlytics",
            "FirebaseDatabaseInternal",      // Not "FirebaseDatabase"
            "FirebaseFirestoreInternal",     // Not "FirebaseFirestore"
            "FirebaseMessaging",
            "FirebaseRemoteConfigInternal",  // Not "FirebaseRemoteConfig"
            "FirebaseABTesting",             // Module-only, no product
        ),
    )
}

Firebase importedClangModules Reference

Several Firebase products expose ObjC headers through Clang modules whose names differ from the SPM product name:

SPM Product	Clang Module (importedClangModules)	Notes
FirebaseAnalytics	FirebaseAnalytics	Same name
FirebaseAuth	FirebaseAuth	Same name
FirebaseCore	FirebaseCore	Same name
FirebaseCrashlytics	FirebaseCrashlytics	Same name
FirebaseDatabase	FirebaseDatabaseInternal	Different
FirebaseFirestore	FirebaseFirestoreInternal	Different
FirebaseInAppMessaging-Beta	FirebaseInAppMessagingInternal	Different
FirebaseRemoteConfig	FirebaseRemoteConfigInternal	Different
FirebaseInstallations	FirebaseInstallations	Same name
FirebaseMessaging	FirebaseMessaging	Same name
FirebasePerformance	FirebasePerformance	Same name
FirebaseStorage	FirebaseStorage	Same name
FirebaseAppCheck	FirebaseAppCheck	Same name
FirebaseAppDistribution-Beta	FirebaseAppDistribution	Same name (no `-Beta`)
(transitive)	FirebaseABTesting	Module-only, no product
FirebaseAI	(none)	Swift-only, no cinterop
FirebaseFunctions	(none)	Swift-only, no cinterop
FirebaseMLModelDownloader	(none)	Swift-only, no cinterop

Note: When discoverClangModulesImplicitly = false (recommended for Firebase), you must list every Clang module you import in importedClangModules. When true (default), importedClangModules is ignored — but this will fail for Firebase due to C++ transitive dependencies.

Firebase Initialization

Ensure GoogleService-Info.plist is included in the iOS app target. In the app's entry point:

import Firebase
FirebaseApp.configure()  // Must be called before using any Firebase service

Google Maps

Repository: https://github.com/googlemaps/ios-maps-sdk.git

Key facts:

iOS 16+ only — no macOS, tvOS, or watchOS support
Xcode 16.0+ required
Must use exact() version — from() will fail to resolve
Single SPM product: GoogleMaps (wraps a binary xcframework via GoogleMapsTarget)
CocoaPods subspec GoogleMaps/Maps maps to the single GoogleMaps SPM product
Requires a Google Maps Platform API key configured in the iOS app
Check releases for available SPM versions

// CocoaPods
pod("GoogleMaps") { version = "10.10.0" }

// SwiftPM — use the exact same version as the pod
swiftPackage(
    url = "https://github.com/googlemaps/ios-maps-sdk.git",
    version = "10.10.0",
    products = listOf("GoogleMaps"),
)

Kotlin import:

import swiftPMImport.<group>.<module>.GMSMapView
import swiftPMImport.<group>.<module>.GMSCameraPosition
import swiftPMImport.<group>.<module>.GMSMarker
import swiftPMImport.<group>.<module>.GMSServices

iOS project requirement: The API key must be set in the app delegate or SwiftUI app entry point:

import GoogleMaps
GMSServices.provideAPIKey("YOUR_API_KEY")

Repository: https://github.com/google/GoogleSignIn-iOS.git

Key facts:

iOS 12+, macOS 10.15+ — broad platform support
Two SPM products: GoogleSignIn (core) and GoogleSignInSwift (SwiftUI support)
CocoaPods pods: GoogleSignIn and GoogleSignInSwiftSupport
Uses from() versioning (latest: 9.1.0)

// CocoaPods
pod("GoogleSignIn") { version = "8.0.0" }

// SwiftPM — use same version as pod
swiftPackage(
    url = "https://github.com/google/GoogleSignIn-iOS.git",
    version = "8.0.0",
    products = listOf("GoogleSignIn"),
)

Kotlin import:

import swiftPMImport.<group>.<module>.GIDSignIn
import swiftPMImport.<group>.<module>.GIDSignInButton

iOS project requirement: Add GIDClientID to Info.plist and configure the URL scheme for OAuth redirect. See Google Sign-In iOS docs.

LoremIpsum

Simple text generation library with direct mapping.

// CocoaPods
pod("LoremIpsum") { version = "2.0.1" }

// SwiftPM — use same version as pod
swiftPackage(
    url = "https://github.com/lukaskubanek/LoremIpsum.git",
    version = "2.0.1",
    products = listOf("LoremIpsum"),
)

Kotlin import:

import swiftPMImport.<group>.<module>.LoremIpsum

Quick Reference Table

Pod Name	SPM Product	SPM Repository	Version Type	Platform	Notes
FirebaseAnalytics	FirebaseAnalytics	firebase/firebase-ios-sdk.git	from()	All
FirebaseAuth	FirebaseAuth	firebase/firebase-ios-sdk.git	from()	All
FirebaseCore	FirebaseCore	firebase/firebase-ios-sdk.git	from()	All
FirebaseCrashlytics	FirebaseCrashlytics	firebase/firebase-ios-sdk.git	from()	All	Needs dSYM upload script
FirebaseDatabase	FirebaseDatabase	firebase/firebase-ios-sdk.git	from()	All	importedClangModules: FirebaseDatabaseInternal
FirebaseFirestore	FirebaseFirestore	firebase/firebase-ios-sdk.git	from()	All	importedClangModules: FirebaseFirestoreInternal
FirebaseFunctions	FirebaseFunctions	firebase/firebase-ios-sdk.git	from()	All	Swift-only, no cinterop
FirebaseMessaging	FirebaseMessaging	firebase/firebase-ios-sdk.git	from()	All
FirebaseRemoteConfig	FirebaseRemoteConfig	firebase/firebase-ios-sdk.git	from()	All	importedClangModules: FirebaseRemoteConfigInternal
FirebaseStorage	FirebaseStorage	firebase/firebase-ios-sdk.git	from()	All
FirebasePerformance	FirebasePerformance	firebase/firebase-ios-sdk.git	from()	iOS/tvOS
FirebaseInAppMessaging	FirebaseInAppMessaging-Beta	firebase/firebase-ios-sdk.git	from()	iOS/tvOS	`-Beta` suffix, importedClangModules: FirebaseInAppMessagingInternal
FirebaseAppDistribution	FirebaseAppDistribution-Beta	firebase/firebase-ios-sdk.git	from()	iOS only	`-Beta` suffix
FirebaseABTesting	(none)	firebase/firebase-ios-sdk.git	—	All	Module-only, importedClangModules only
FirebaseAILogic	FirebaseAI	firebase/firebase-ios-sdk.git	from()	All	Renamed, Swift-only
GoogleMaps	GoogleMaps	googlemaps/ios-maps-sdk.git	exact()	iOS 16+ only
GoogleSignIn	GoogleSignIn	google/GoogleSignIn-iOS.git	from()	iOS 12+, macOS 10.15+
GoogleSignInSwiftSupport	GoogleSignInSwift	google/GoogleSignIn-iOS.git	from()	iOS 12+, macOS 10.15+	SwiftUI support
LoremIpsum	LoremIpsum	lukaskubanek/LoremIpsum.git	from()	All

KMP Wrapper Libraries with Bundled Cinterop Klibs

Some KMP libraries that wrap iOS SDKs ship pre-built cinterop klibs using the cocoapods.* package namespace. After migrating to SwiftPM, these cocoapods.* imports must be preserved — they resolve to the library's bundled klib, not to actual CocoaPods infrastructure.

KMPNotifier

Repository: https://github.com/mirzemehdi/KMPNotifier Maven: io.github.mirzemehdi:kmpnotifier

What it provides: A KMP push notification library that wraps Firebase Cloud Messaging on iOS. The library bundles its own cinterop klib with namespace cocoapods.FirebaseMessaging, providing Kotlin bindings for FIRMessaging, FIRMessagingAPNSTokenType, and related classes.

Impact on migration:

When swiftPMDependencies generates cinterop bindings, it detects that FirebaseMessaging bindings already exist in KMPNotifier's klib and skips generating new bindings for that Clang module
import cocoapods.FirebaseMessaging.FIRMessaging must remain unchanged — do NOT replace with swiftPMImport.*
FirebaseMessaging should still be listed in products and importedClangModules for SPM linking, even though cinterop bindings won't be generated for it

Verifying bundled klib contents: Use klib dump-metadata-signatures to inspect what a library's klib provides (docs):

find ~/.gradle/caches -name "*.klib" -path "*kmpnotifier*" | head -1
klib dump-metadata-signatures /path/to/cinterop.klib | grep "FIRMessaging"
# Shows: cocoapods.FirebaseMessaging/FIRMessaging → confirms bundled klib

Example — project using both KMPNotifier and GoogleSignIn:

// IOSDelegate.kt — after migration
import cocoapods.FirebaseMessaging.FIRMessaging           // KEEP — from kmpnotifier klib
import cocoapods.FirebaseMessaging.FIRMessagingAPNSTokenType  // KEEP — from kmpnotifier klib
import swiftPMImport.com.example.app.GIDSignIn            // REPLACE — direct cinterop

dev.gitlive/firebase-kotlin-sdk

Repository: https://github.com/GitLiveApp/firebase-kotlin-sdk Maven: dev.gitlive:firebase-auth, dev.gitlive:firebase-firestore, dev.gitlive:firebase-storage, etc.

What it provides: Kotlin-first Firebase APIs for KMP. Unlike KMPNotifier, dev.gitlive libraries provide high-level Kotlin APIs — you typically don't use cocoapods.* imports directly. Instead, the Firebase pods were declared with linkOnly = true in CocoaPods to provide native linking only.

Impact on migration:

Linker flags baked into published klibs. The dev.gitlive klibs contain -framework FirebaseCore, -framework FirebaseAuth, etc. from the CocoaPods era. These persist when the consuming project switches to SPM. With SPM, Firebase frameworks land in per-product subdirectories ($BUILT_PRODUCTS_DIR/FirebaseCore/FirebaseCore.framework) that the K/N linker doesn't search automatically.

Fix: Add per-product -F linkerOpts to build.gradle.kts:

val builtProductsDir = System.getenv("BUILT_PRODUCTS_DIR")
if (builtProductsDir != null) {
    listOf("FirebaseCore", "FirebaseAuth", "FirebaseCoreExtension",
           "FirebaseCoreInternal", "FirebaseCrashlytics", "FirebaseFirestore",
           "FirebaseFirestoreInternal", "FirebaseInstallations", "FirebaseMessaging",
           "FirebaseStorage", "GoogleDataTransport", "GoogleUtilities",
           "GTMSessionFetcher", "AppCheckCore", /* ... */).forEach { product ->
        linkerOpts("-F", "$builtProductsDir/$product")
    }
}

Also add matching FRAMEWORK_SEARCH_PATHS in the Xcode project for both Debug and Release.

Must use isStatic = true. With a dynamic framework, the K/N linker creates @rpath/FirebaseCore.framework/FirebaseCore load instructions. Firebase SPM products are static libraries — their .framework bundles are not embedded in the app bundle. At runtime, dyld crashes with Library not loaded. Switching to isStatic = true embeds all symbols and defers unresolved framework flags to the final Xcode link.

iOS test tasks may fail. The K/N test runner cannot find Firebase frameworks outside of Xcode context. You may need to disable iOS test tasks:

tasks.matching {
    (it.name.contains("Ios") || it.name.contains("ios")) &&
        (it.name.contains("Test") || it.name.contains("test"))
}.configureEach { enabled = false }

Researching Other Pods

For pods not listed here:

Check GitHub repository - Look for a Package.swift file in the repo
Check CocoaPods spec - The source field often points to the Git URL
Search Swift Package Index - https://swiftpackageindex.com/
Check library documentation - Many libraries document SPM installation

Finding the Clang Module Name

If you're unsure of the correct Clang module name:

Keep discoverClangModulesImplicitly = true (default)
Run ./gradlew build
Check build errors for available class names
Or check the library's module.modulemap file in its source

Identifying Bundled Cinterop Klibs in Unknown Libraries

If you suspect a KMP library bundles its own cinterop klibs (common for libraries wrapping iOS SDKs), use the klib tool to inspect them (docs):

# Find klibs from a specific library in Gradle caches
find ~/.gradle/caches -name "*.klib" -path "*libraryName*"

# Dump API signatures to see what namespaces and classes are provided
klib dump-metadata-signatures /path/to/library.klib | grep "cocoapods\."

# If output shows cocoapods.* entries, the library bundles cinterop klibs
# Those cocoapods.* imports must be preserved after migration

Indicators that a library may bundle cinterop klibs:

The project has linkOnly = true pod declarations for the same native SDK
The library's documentation mentions CocoaPods integration or cinterop
The library provides Kotlin APIs for an iOS SDK (Firebase, Maps, etc.)

Version Compatibility

Do NOT bump dependency versions during migration — use the exact same version from the cocoapods {} block. Always:

Use the same version. If the pod was version = "1.4.1", the SPM package must be exact("1.4.1"). Bumping versions can break cinterop APIs and introduce issues unrelated to the migration.
CocoaPods version = "X.Y.Z" (without ~>) is an exact pin — use exact("X.Y.Z") in SPM, not from(). Only use from() when the CocoaPods spec used optimistic versioning (~>).
Check the GitHub releases page to confirm the exact version is available as an SPM release
Test thoroughly after migration

22 KiB Raw Permalink Blame History

Common Pods to SwiftPM Mapping

Firebase Suite

Firebase SPM Products Reference

FirebaseAnalytics

FirebaseAuth

FirebaseDatabase

FirebaseFirestore (Special Case)

FirebaseCrashlytics

Combined Firebase Example

Firebase importedClangModules Reference

Firebase Initialization

Google Maps

Google Sign-In

LoremIpsum

Quick Reference Table

KMP Wrapper Libraries with Bundled Cinterop Klibs

KMPNotifier

dev.gitlive/firebase-kotlin-sdk

Researching Other Pods

Finding the Clang Module Name

Identifying Bundled Cinterop Klibs in Unknown Libraries

Version Compatibility

22 KiB

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