01 · Vantle steel card+ Vaults

Round up to somewhere.

VANTLE

Vantle is a steel spend card. Every purchase rounds up to the next dollar, and the change goes to goals you named.

Get your cardSee where $0.65 goes

Swept every Monday · Pause anytime · Concept product

02 · An example week+$4.90

One week, rounded up.

Each purchase rounds up to the next dollar. The difference waits until Monday, then moves to your vaults in one transfer. Exact-dollar purchases add nothing.

DayPurchasePaidSaved
MONCoffee−$4.35+$0.65
MONBus fare−$2.75+$0.25
TUEGroceries−$38.10+$0.90
WEDLunch−$11.60+$0.40
THUPharmacy−$8.15+$0.85
FRIBooksExact dollar−$24.00$0.00
FRICinema−$13.50+$0.50
SATMarket−$17.20+$0.80
SUNBakery−$6.45+$0.55
Round-ups this week+$4.90

Example week. Purchases are illustrative.

Skip the animation

03 · Where the change goes4 steps

Follow $4.90 through one week.

  1. 1 · Tap

    Coffee, $4.35. The card pays $4.35 and sets $0.65 aside.

    The steel card rests on a card reader. A chip reads Coffee −$4.35 and +$0.65 is set aside.

  2. 2 · Round up

    Every purchase does the same. By Sunday this week's change adds up to $4.90.

    Brass coins from each purchase gather in one pile above the vaults, labelled This week +$4.90.

  3. 3 · Split

    You choose the split. Here it's 50 / 30 / 20 across three vaults: $2.45, $1.47 and $0.98.

    The pile divides into three stacks above three glass vaults: +$2.45, +$1.47 and +$0.98.

  4. 4 · Monday

    One sweep every Monday keeps your statement to a single transfer. Lisbon in May just reached 75%: $900.00 of $1,200.

    Monday's sweep drops the coins into the vaults. Lisbon in May reaches its 75% ring: $900.00 of $1,200.

Example balances, purchases and split. No interest is shown or implied.

04 · The rules4

Four rules, written down.

Round-ups are easy to explain and easy to get wrong. These are the only rules Vantle follows.

  1. 01

    Rounds up to the next dollar

    +$0.65

    $4.35 becomes $5.00. The $0.65 goes to your vaults.

  2. 02

    Exact dollars add nothing

    $0.00

    A $24.00 book stays $24.00. Nothing is set aside.

  3. 03

    Swept every Monday

    MON

    Change collects through the week and moves in one transfer.

  4. 04

    Boost if you want

    ×1

    ×2 or ×3 sets aside double or triple the change. Off unless you turn it on.

  5. $

    What it costs

    $3/MO

    $3 a month. No fee to pause, change the split or move money out.

    Example pricing for this concept.

05 · Try it3 steps

Set up a vault in three steps.

Name a goal, pick a weekly amount, and see when you get there. Nothing is saved or sent.

Step 1 of 3

1 · Name it

2 · Set a weekly amount
$25a week

Round-ups

Round-ups add about $5 a week at ×1, based on the example week.

3 · See the date

You reach $1,200 on August 9, 2027 40 weeks

Milestones

    Change the amount or pause any week. No fee to pause.

    Example only. Uses your weekly amount plus estimated round-ups, rounded to the nearest dollar. Assumes no interest, no withdrawals and no paused weeks.

    Each line is one week. The solid band is your first week: $30.

    06 · You're in charge4 switches

    Every setting has an off switch.

    Vaults are yours to stop, change and empty. None of it costs anything.

    Preview only. Try it on this week's example.

    This week+$4.90

    Round-ups on. Next sweep Monday, November 2.

    Pause round-ups
    Per vault or all at once. Your goal date moves; nothing else changes.
    Change the split
    50 / 30 / 20 today, 100 / 0 / 0 next week. Takes effect at the next sweep.
    Move money out
    Back to your spending balance whenever you want.
    Freeze the card
    One tap in the app. Unfreeze the same way.

    07 · The card16 g

    Sixteen grams of brushed steel.

    VANTLE

    Showing the card in Brushed steel.

    A stainless face, a deep-teal anodized edge, and no number printed on the front. The last four digits are laser-engraved on the back.

    Size
    85.60 × 53.98 mmID-1, the standard card size
    Corner radius
    3.18 mm
    Weight
    About 16 g
    Face
    0.8 mm brushed stainless steel
    Edge
    Deep-teal anodized
    Front
    Chip and engraved mark. Nothing else.
    Back
    Last four digits, name, expiry. Laser-engraved.

    Concept specification.

    VANTLE

    08 · WaitlistOpen

    Name the first thing worth rounding up for.

    $3 a month, example pricing. Pause or leave anytime.

    See how vaults work

    Concept product. Nothing is sent from this page.

    Concept project · 2026

    Concept project by Victor Cavalcante · design & front-end

    1. 01

      Brief I set myself: a launch page for a fictional fintech card in one HTML file, with no photos. Every visual is built in code with three.js, canvas and SVG.

    2. 02

      Onboarding: the page asks for one small commitment before the big one. You name a goal and see a date first, and the waitlist form then speaks to that goal.

    3. 03

      Conversion and trust: the rules, the off switches and the price sit before the form, every projection carries its assumptions next to it, and no interest rate appears anywhere.

    4. 04

      What I'd test next: whether showing the projected date in the hero, before any scrolling, raises demo completion and waitlist sign-ups.

    More work at victorvk.com

    Concept, self-initiated. Design and front-end by Victor Cavalcante.