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Spectro vs Offline Captions

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

Spectro compared with Offline Captions
DetailSpectro logo SpectroOffline Captions logo Offline Captions
What it doesDetects fake lossless audio files on Mac by analyzing spectral content Word-by-word caption app for Windows, pay once
StageNot given Startup
FoundedNot given 2026
Based inNot given IN
Pricing modelPaid Paid
PricingPersonal: $24.99 USD (one-time, 1 Mac). Duo: $39 USD (one-time, 2 Macs). Both plans include unlimited file scans, offline and private analysis, free updates, and 30-day money-back guarantee. Free trial: 100 tracks with no time limit and no account required. Founding price $29 once, regular price $39 once; free web version for clips up to 5 minutes
Key features
  • Full FFT spectral analysis with automatic LOSSLESS, MEDIUM, or FAKE verdict per track
  • Batch scanning and CSV export of results with verdict, format, bitrate, cutoff frequency and confidence score
  • Automatic macOS Finder color tags applied directly to files
  • Rekordbox XML import without drag and drop required
  • Support for WAV, AIFF, FLAC, ALAC, MP3, AAC, Ogg Vorbis and Opus formats
  • Folder watch mode with automatic analysis of new tracks
  • M3U and M3U8 playlist import for Traktor, VirtualDJ and other software
  • Bulk spectrogram PNG export for analyzed tracks
  • Completely offline operation with no internet or account required
  • 99% accuracy on transcoding detection based on peer-reviewed research across 2,512 songs
  • Four caption styles: Bold, Clean, Punch, Reveal
  • MP4 and SRT file export
  • Offline transcription with no uploads
  • Yellow highlighting for uncertain words
  • Free browser version for clips up to 5 minutes
What makes it different
  • Native macOS application optimized for Apple Silicon and Intel with full sandboxing and notarization
  • One-time purchase with free updates, never a subscription or per-track fee
  • 30-day money-back guarantee on all purchases
  • Based on peer-reviewed research from 2009 ACM Multimedia & Security Workshop
  • Works with existing DJ workflows including Rekordbox, Traktor and VirtualDJ
  • Offline transcription on your own computer with no uploads or internet required
  • One-time purchase with no subscription, no per-video fees, and unlimited videos
  • Personal dictionary that learns and applies fixes across all videos
  • Batch export to caption an entire week of videos in one run
  • Hinglish support with Roman script output for Hindi-English creators
Community votes00
DR (Domain Rating by Ahrefs)7 +2 (up) since last check2 no change since last check
Trust Flow (Majestic)74
Citation Flow (Majestic)2212
Referring domains (Majestic)278

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