Key & BPM Lab vs Spectro

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

Key & BPM Lab compared with Spectro
Detail	Key & BPM Lab	Spectro
What it does	Free browser-based audio tools for finding and changing song key and BPM	Detects fake lossless audio files on Mac by analyzing spectral content
Stage	Not given	Not given
Founded	Not given	Not given
Based in	Not given	Not given
Pricing model	Freemium	Paid
Pricing	Free plan includes Key & BPM Finder and Changer, Audio Cutter and Joiner, BPM Tapper and Metronome, Voice Recorder, and local processing tools with files saved for 6 hours. Plus plan: $9.90/month with 1,000 credits per month and files saved for 7 days. Pro plan: $19.90/month with 2,500 credits per m	Personal: $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.
Key features	Detect song tempo, musical key, scale and Camelot code Change key and BPM independently and export as WAV Cut and join audio segments Record voice and tap beat timing Practice with online metronome Remove vocals from songs Split songs into instrument stems Enhance audio quality with AI Convert audio to editable MIDI	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
What makes it different	Process audio locally in browser without uploading to servers No file storage or account required for free tools All free tools with privacy-first design Direct export from browser without server processing	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
Community votes	0	0
DR (Domain Rating by Ahrefs)	25 −1 (down) since last check	3 no change since last check
Trust Flow (Majestic)	19	7
Citation Flow (Majestic)	12	22
Referring domains (Majestic)	35	27

5 details filled in for both companies.

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