How it works

You spend. The leftover buys stocks.

The merchant is paid in full. The round-up is invested in the stocks you pick.

  1. 01

    Spend

    Pay with USDC, ETH, or SOL, just like you do today.

  2. 02

    Round up

    $18.42 becomes $19.00. The $0.58 is set aside.

  3. 03

    Swap weekly

    Approve one swap a week. Your spare change becomes SPYx in your own wallet.

Spare-change math

What a week becomes

An illustrative 8% a year. Not a forecast.

Each leftover
$0.58
This week
$4.64
This year
$241.28
10 years*
$3,692.11
Year 1$241.28
Year 5$1,481.96
Year 10$3,692.11