Submarine Player

Submarine Player is a macOS desktop video player for Apple Silicon users who want real-time AI subtitles and translation while watching local video files.

Key capabilities include:

• Instant subtitle generation during playback (or transcription-only captions in the original language)
• On-device processing for offline use and privacy (optional online translation can be enabled in system settings)
• Dual subtitles (original and translated side-by-side) and support for 19 languages for transcription and translation
• Universal format playback for common files like MP4, MKV, AVI, MOV, and WMV
• Batch processing and subtitle export in SRT, VTT, or CSV
• Multiple transcription models to balance performance vs accuracy

Pricing: Freemium. Free plan includes unlimited playback and 7 subtitle generations per week; Plus costs $2.99/month or $19.99/year; lifetime access is $29.99 (limited-time offer).

Notable for running subtitle generation locally on Apple Silicon (M1 or newer) Macs on macOS 15.0+, reducing reliance on external subtitle files and enabling offline subtitle creation for nearly any video.