Free: up to 500 tracks forever. Pro Monthly: $6.99/month, billed monthly, cancel any time. Pro Yearly: $59/year (save 30%).
SlapMail: $8/user/month (billed yearly). SlapPortal: plans start at $12/month (billed yearly) for up to 5 active users and scale from there. Both include free trial with no credit card required.
Key features
Local BPM, key and energy analysis from audio
Harmonic matching with reasons
Set Brief with energy planning
Auto Flow for running order optimization
Spiral Paths with alternative transitions
Set Check for transition and energy validation
Export to Rekordbox, Traktor, Serato and more
Gig Log to track prepared vs. played sets
Forgotten Gems to rediscover underused tracks
Runs 100% offline in your browser
Sync Gmail and Outlook emails to Notion automatically
Reply to emails from Notion
Smart email routing based on labels and folders
Automatic contact linking
Attachment storage in Notion
Share inboxes across teams
Property-level access control for portals
Real-time bidirectional sync
No separate interface to build
Works with free Notion accounts
What makes it different
No music uploads—all analysis runs locally in your browser with no cloud processing
Shows the reason why each track fits before you commit
Plans energy arc deliberately with a Set Brief that drives the entire workflow
Prepares alternative exits (Hold, Lift, Reset, Surprise) without repeating tracks
Exports to the DJ software you already use and integrates with your existing setup
Built specifically for Notion workflows
One source of truth for sales, support, and client work
No data duplication between workspace and portal
Google CASA Tier 2 certified and Microsoft-verified
Spiral DJ
Slap