Save & Grow
Make your money actually grow.
High-yield savings at 4.50% APY, automatic round-ups, and fractional stocks & Bitcoin from $1. One app, every dollar working.
Watch it grow
From spare change to a real portfolio.
Tap a step — or watch it play. Each screen is rendered live on the phone.
01/04
Live preview
9:41
Good evening, Maya
Your money is earning while you sleep.
Earning at
4.50% APY
No minimums · FDIC insured up to $250k
Today
+$0.32
This month
+$9.84
Home
Save
Invest
Me
High-yield savings
Earn 4.50% APY every day.
Move money into Savings and start earning instantly. No minimums, no lockups, withdraw anytime.
- Variable APY, tracked transparently
- No monthly fees, no minimum balance
- Withdraw to spending in seconds
Savings
Main bucket
+4.50% APY
$12,480.21
+$46.18 this month
Daily
$1.54
MTD
$46.18
YTD
$510
Round-Ups
Spare change, auto-invested.
Every Nitro Card swipe rounds up to the next dollar. The change sweeps into Savings, stocks, or Bitcoin — your call.
- Toggle the destination anytime
- Pause whenever
- Average user: $34/month auto-saved
Last 5 swipes
Blue Bottle$4.85→ $0.15
Trader Joe's$38.42→ $0.58
Lyft$12.10→ $0.90
Spotify$11.99→ $0.01
7-Eleven$6.30→ $0.70
Sweeping toBitcoin
Investing
Stocks & Bitcoin from $1.
Buy fractional shares of any major stock or stack sats with recurring buys. Zero commissions, no minimums, Lightning-fast withdrawals.
- Recurring buys weekly or monthly
- Lightning Network for BTC
- Tax docs auto-generated
AAPL
0.142 shares
$28.40
+12.4%
BTC
0.00821 BTC
$614.20
+38.1% YTD
Get early access to Save & Grow.
Limited spots per cohort. Drop your email and we'll send your invite.