The state of watchOS

Built into the OS

8 Apple frameworks already cover 26 capabilities on watchOS — nothing to add to your Package.swift. Floors come from Apple's own symbol graphs.

Packages by capability

How many verified packages serve each capability on watchOS. Every link opens the truth table focused on watchOS — near-misses included.

The fence list

12 verdicts across 12 packages, proven off watchOS. Where a build verdict grounds the claim, the receipt is the compiler's own words at the pinned commit — and the same commit builds elsewhere, so the fence is real, not toolchain rot.

Honest unknowns

86 verdicts we can't call yet — and refuse to guess. Each carries the reason on record.

• AECAudioStream — Echo cancellation

  watchOS absent from manifest floors; no source fence

• AudioKit — Audio file reading/writing

  watchOS absent from manifest floors

• AudioKit — Audio level metering

  watchOS absent from manifest floors

• AudioKit — Microphone recording

  watchOS absent from manifest floors

• AudioKit — Audio synthesis / DSP

  watchOS absent from manifest floors; no source fence proves absence

• AudioKit — MIDI file read/write

  watchOS absent from manifest floors

• AudioKit — MIDI input/output

  watchOS absent from manifest floors; MIDI symbols resolve present but intent is unstated

• AudioKit Waveform — Waveform visualization

  watchOS absent from manifest floors

• AudioKitUI — Waveform visualization

  watchOS absent from manifest floors

• AudioManager — Audio playback

  watchOS absent from manifest floors

• AudioRecorder — Microphone recording

  watchOS absent from manifest floors

• CAAudioHardware — Audio device selection

  manifest declares macOS only

• ChunkedAudioPlayer — Audio streaming

  watchOS absent from manifest floors

• CombineMIDI — MIDI input/output

  watchOS absent from manifest floors

• DevoloopAudioKit — Audio synthesis / DSP

  watchOS absent from manifest floors

• DSWaveformImage — Waveform visualization

  watchOS absent from manifest floors

• DunneAudioKit — Audio synthesis / DSP

  watchOS absent from manifest floors

• ExyteMediaPicker — Camera capture

  watchOS absent from manifest floors

• FDSoundActivatedRecorder — Microphone recording

  watchOS absent from manifest floors

• FDWaveformView — Waveform visualization

  watchOS absent from manifest floors

• floatingpanel — Bottom sheets

  Manifest declares only .iOS(.v12); no watchOS floor. UIKit-based UIViewController surface; digest records no watchOS gap but no positive build evidence either.

• FluidAudio — Speech-to-text

  watchOS absent from manifest floors

• FRadioPlayer — Audio streaming

  watchOS absent from manifest floors

• Gifu — Animated GIF playback

  watchOS absent from manifest floors

• grdb.swift — Database encryption

  no claim recorded for this platform yet

• grdb.swift — In-memory database

  README: 'Database queues support in-memory databases' (v7.11.1 README.md line 423)

• HLSCore — HLS streaming

  watchOS absent from manifest floors

• HLSVideoCache — HLS streaming

  watchOS absent from manifest floors

• Kingfisher — WebP decoding

  WebP needs the separate KingfisherWebP coder package — nothing in this package serves it

• KSPlayer — Video playback

  watchOS absent from manifest floors

• LiveKit — Noise cancellation

  watchOS absent from the manifest platforms (iOS/macOS/macCatalyst/tvOS); the SDK's WebRTC binary dependency makes watchOS support doubtful, but nothing in source proves absence

• LiveKit — WebRTC real-time streaming

  watchOS absent from manifest floors

• LiveKit — Video calling

  watchOS absent from manifest floors

• LiveKit — Screen sharing

  watchOS absent from manifest floors

• LiveKit — Voice calling

  watchOS absent from manifest floors

• LiveKitKrispNoiseFilter — Noise cancellation

  watchOS absent from manifest floors

• lottie-ios — Vector animation playback

  Package.swift declares no watchOS platform floor (iOS/macOS/tvOS/visionOS only). Missing floor is not absence evidence, so status is unknown.

• MidiParser — MIDI file read/write

  empty manifest

• MLXAudio — Text-to-speech

  watchOS absent from manifest floors

• ModernAVPlayer — Video playback

  watchOS absent from manifest floors; no source fence

• MorkAndMIDI — MIDI input/output

  watchOS absent from manifest floors

• MuxPlayerSwift — Video playback

  watchOS absent from manifest floors; no source fence

• Player — Video playback

  watchOS absent from manifest floors; no source fence

• popupview — Bottom sheets

  Public decl present per surface digest, but internal sheet implementation is os(iOS)-gated; behavior on watchOS unverified

• pow — Particle effects

  Surface shows no watchOS gap (decl is unguarded), but gaps are #if-derived, not build verdicts; manifest declares no watchOS floor and README requirements omit watchOS. No build verification, so unknown.

• pow — View transitions / motion effects

  Surface shows no watchOS gap (decl is unguarded), but gaps are #if-derived, not build verdicts; manifest declares no watchOS floor and README requirements omit watchOS. No build verification, so unknown.

• progresshud — Loading indicators

  Only .iOS(.v17) declared; missing floor is not absence evidence.

• progresshud — Toasts / banners

  Only .iOS(.v17) declared; missing floor is not absence evidence.

• realm-swift — Database encryption

  README 'Fully Encrypted' section demonstrates Realm.Configuration(encryptionKey: key) with a 64-byte key ('Data can be encrypted in-flight and at-rest').

• richtextkit — Rich text editing

  The core editor guard omits watchOS (with 'iOS'/'macOS' defined only for iOS/macCatalyst/macOS in Package.swift), so the editor view is compiled out on watchOS. The digest resolves this as conditional, not absent, so absence cannot be proven.

• sdwebimage — WebP decoding

  Apple-ImageIO-backed WebP coder is in the core surface, but it depends on OS-level WebP support (iOS 14+/macOS 11+ per README), is not registered by default for animated WebP, and its runtime availability checks live in unparsed implementation files.

• SFBAudioEngine — Audio playback

  the playback engine's primary surface is Objective-C (194 files unparsed in v1); Swift-side extraction found no anchorable player symbol — honestly unverified rather than guessed

• snapkit — Auto Layout DSL

  UIView-backed DSL branch: digest gaps mark watchOS absent for this variant.

• SoulAudioKit — Audio synthesis / DSP

  watchOS absent from manifest floors

• SoundpipeAudioKit — Pitch detection

  watchOS absent from manifest floors

• SpeziSpeech — Speech-to-text

  watchOS absent from manifest floors

• SpeziSpeech — Text-to-speech

  watchOS absent from manifest floors

• SPFKAudioHardware — Audio device selection

  manifest declares macOS only

• SPFKSoundAnalysis — Sound classification

  manifest declares macOS only

• SporthAudioKit — Audio synthesis / DSP

  watchOS absent from manifest floors

• sqlite.swift — Database encryption

  SQLCipher product is linked only .when(platforms: applePlatforms, traits: ["SQLCipher"]); watchOS is in applePlatforms, so encryption works when the SQLCipher trait is enabled — conditional, hence unknown.

• STKAudioKit — Audio synthesis / DSP

  watchOS absent from manifest floors

• StreamVideo — WebRTC real-time streaming

  watchOS absent from manifest floors (iOS-only manifest)

• StreamVideo — Video calling

  watchOS absent from manifest floors (iOS-only manifest)

• StreamVideo — Screen sharing

  watchOS absent from manifest floors (iOS-only manifest)

• StreamVideo — Voice calling

  watchOS absent from manifest floors (iOS-only manifest)

• swift-system-sound — Audio playback

  empty manifest

• SwiftAudioEx — Background audio playback

  manifest declares iOS only

• SwiftAudioEx — Audio playback

  manifest declares iOS only; AVPlayer exists elsewhere but the package states no intent

• SwiftAudioEx — Now-playing / remote controls

  manifest declares iOS only; AVPlayer exists elsewhere but the package states no intent

• SwiftAudioPlayer — Audio streaming

  watchOS absent from manifest floors

• SwiftEdgeTTS — Text-to-speech

  watchOS absent from manifest floors

• SwiftLAME — MP3 encoding/decoding

  watchOS absent from manifest floors

• SwiftSpeech — Speech-to-text

  watchOS absent from manifest floors

• SwiftTTS — Text-to-speech

  watchOS absent from manifest floors

• swiftui-pull-to-refresh — Loading indicators

  Surface parses PRESENT, but UIViewRepresentable/UIActivityIndicatorView are unavailable on watchOS and the reference is unguarded; unknown.

• swiftui-pull-to-refresh — Pull to refresh

  Surface parses PRESENT, but UIViewRepresentable/UIActivityIndicatorView are unavailable on watchOS and the reference is unguarded; no absence guard evidence, so unknown.

• SwiftWhisper — Speech-to-text

  memory constraints make whisper.cpp doubtful; nothing proven

• Swifty360Player — Video playback

  watchOS absent from manifest floors; no source fence

• SwiftySound — Audio playback

  README targets iOS/macOS/tvOS; no watchOS signal either way

• vapor — HTTP/2

  no claim recorded for this platform yet

• VideoIO — Camera capture

  watchOS absent from manifest floors; no camera API there anyway — but nothing in source proves it

• VOICEVOX — Text-to-speech

  watchOS absent from manifest floors

• WebMIDIKit — MIDI input/output

  empty manifest

• WebRTC (stasel) — WebRTC real-time streaming

  binary-only

• YouTubePlayerKit — Video playback

  watchOS absent from manifest floors; no source fence