Early Access

One Card — combine your balances at checkout

Link your existing cards and set how to fund every purchase — sequentially or by percentage. The merchant sees one card you control the split.

See demo

funding modes

JIT

virtual card ready*

PCI

tokenized inputs

Checkout • $28.75

Visa ••4242

$ 6.00

Mastercard ••4444

$ 15.00

Discover ••1111

$ 7.75

* Visual mock. Real product uses tokenization and issuer JIT funding.

Why One Card?

A single card at checkout. Your rules behind the scenes.

Instant rules

Choose sequential drain or percentage-based sharing. Adjust per card.

Bank-level security

Tokenization only. No raw card data in the app. Virtual card funding.

Clear tracking

Every purchase is journaled with exact sources and amounts.

How it works

1
Link
Connect your existing cards via a secure provider.
2
Set rules
Pick sequential or percentage, caps, and priorities.
3
Tap once
Use the One Card. We split funding automatically.
4
Track
See a ledger of sources for every transaction.

One Card workflow explanation - shows how multiple funding sources combine into a single card payment

Security & compliance

We avoid raw PAN entry by using a PCI-compliant tokenization provider (e.g., Stripe Financial Connections / Plaid). Funding executes via issuer just‑in‑time controls so merchants see one charge. KYC/AML and program compliance apply for production.

Try the split logic

Edit balances, choose a strategy, and simulate a purchase.

Visa

•• 4242

Available

$6.00

Priority: 1 • Pct: 20%

Mastercard

•• 4444

Available

$15.00

Priority: 2 • Pct: 30%

Discover

•• 1111

Available

$40.00

Priority: 3 • Pct: 50%

Simulator

“Apply” deducts from the fake balances

Transactions

No simulated transactions yet