| Live Captions | Live Captions: System-wide live captions for audio and video content (iOS 16+). | Live Captions: Available system-wide for video, calls, and apps (Windows 11). | Live Captions: Built into Chrome browser and works on audio, videos, and calls. |
| Closed Captions & Subtitles | Supports closed captions and customisable subtitles for media. | Supports captions and subtitles in media players (Windows Media Player, Edge, etc.). | Native support for captions in videos and media streaming apps. |
| Mono Audio | Converts stereo sound into mono audio for one-ear listening. | Mono Audio option combines left/right audio into one channel. | Mono Audio setting combines stereo channels for single-ear listening. |
| Flashing Alerts | Visual alerts for notifications (LED flash on iPad and iPhone). | Visual notifications: Screen flashes or taskbar notifications for system alerts. | Screen-based visual notifications for system and apps. |
| Transcription Tools | Notes App can transcribe speech via Dictation; works system-wide across apps. | Windows Transcription and Microsoft apps (like Teams) offer transcription tools. | Chrome extensions provide transcription. |
| Video Calls | FaceTime supports real-time captions (iOS 15+), TTY support, and ASL sign language interpreters via apps. | Microsoft Teams, Skype, and third-party apps provide real-time captions. | Google Meet supports live captions, and Chrome extensions can enhance accessibility. |
| TTY Support | Built-in TTY support for phone and FaceTime calls. | TTY/TDD support via third-party software or devices. | TTY support is limited; relies on external tools or apps. |
| Sound Recognition | Sound Recognition alerts for fire alarms, sirens, doorbells, dogs barking, etc. | Sound Detection can notify users about sounds like alarms, knocks, and doorbells. | Sound Notifications available via Google Live Transcribe to identify and alert about critical sounds. |
| Hearing Aid Compatibility | Supports MFi (Made for iPhone/iPad) hearing aids for enhanced audio. | Works with Bluetooth hearing aids and Windows-compatible devices. | Limited hearing aid compatibility; works via Bluetooth devices. |
| Audio Balance | Adjusts left/right audio balance for individual hearing needs. | Balance controls for audio channels are available in system settings. | Adjust audio balance through system settings. |
| Text Communication | iMessage supports real-time text (RTT) and multimedia communication. | Windows supports RTT in compatible apps and software. | Google Messages supports RTT and standard text communication. |
