Collector-first comping

Comp the buy. Track the sale. Keep the margin.

Scan cards, track buys, trades, sales, inventory, and know your margin from one dashboard.
Private inventoryCost, margin, labels, and counts stay scoped to your account.
Audit-only salesRecords method category only — Cash, Zelle, Venmo, or Other.
or email sign in
Best for mobile browser testing. No Google login or account setup needed.
Secure sign-in powered by Supabase Auth. Email/password works now; Google works after the Google provider is enabled in Supabase.
UltraMargin
Local Demo · Private

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