Luuna
Get early access

A money coach at every checkout.

Luuna keeps your weekly budget on screen while you shop on your iPhone. At checkout, it shows you where the order leaves you, before you pay.

Free during the beta, on iPhone. The first 1,000 people in get a discount for life.

  1. Shop with your budget on screenSafe Shopping Mode pins what's left this week to the top of the store.
  2. Luuna checks the total at checkoutYou see the order, what you have left, and where you'd land.
  3. You decideWait on it and the money stays yours, or carry on. Either way, you knew the number.
Example checkout. Numbers are illustrative.

Thursday11:47PM

It's late and the cart is one tap from done. By the time you think about the total, the confirmation email has already landed.

Shopping apps are designed to get you past the price.

The saved card and the one-tap button exist to remove the second where you'd normally stop and look at the total. Pay-in-four splits what's left of it into numbers that feel small.

The effect is well measured. In one study, people bidding on tickets to a sold-out basketball game offered more than twice as much when they knew they'd pay by credit card instead of cash (Prelec and Simester, 2001). One-tap checkout makes paying feel like even less.

Most budget apps catch up weeks later, with a chart.

Money has a moment. Luuna is there for it.

Your favorite store
11:46 PM

Still thinking about it? Checkout takes one tap.

Pay later
11:46 PM

Split it into 4 payments. No big deal.

A month later

Budget app
Nov 1

You spent $847.00 on food delivery in October.

Thursday11:48PM

Your budget comes shopping with you.

Give each store you shop a weekly number. Luuna keeps what's left of it at the top of every page and checks every order against it before you pay.

  1. Give your stores a weekly budgetStart with the ones you spend the most in, say $45 a week at Amazon and $30 at Walmart.
  2. Shop in Safe Shopping ModeOpen the store from Luuna or its home-screen widget. What's left for the week stays pinned to the top while you browse.
  3. See where an order leaves youAt checkout Luuna shows the order total, what you have left and where you'd land. Then you choose to wait on it or carry on.
  4. Watch what you keep add upMoney you didn't spend shows up on your Home screen, and each week under budget adds to your streak.
The top of Luuna's Safe Shopping Mode on Amazon: a gold bar showing $46.25 left this week above the Amazon search bar
Safe Shopping Mode on Amazon, from the Luuna beta.

Friday9:02AM

The final say is always yours.

Luuna won't block a store unless you ask it to. It puts the real number in front of you and then gets out of the way. If you still want the thing, buy it.

3-week streak
9:02 AM

Three weeks in a row under your Amazon budget.

Luuna's lock screen for Amazon: Amazon is protected by Luuna, with a button to continue in Safe Shopping Mode

A harder mode, for the weeks you want one.

Lock the shopping apps you open without thinking. Tap one and Luuna opens that store in Safe Shopping Mode instead, with your budget at the top. Core locks up to three apps, and Max locks as many as you like.

Saturday2:15PM

Bring a friend into it.

Pick someone you trust. After they text back YES, Luuna lets them know when you're close to your weekly budget, and you can ask them to approve a purchase that goes over.

Luuna never texts anyone who hasn't said yes, and partners can reply STOP anytime. How partner texts work

Luuna's take

This is the third pair of headphones you've looked at tonight. Maybe sleep on it before adding this one.

Tap the budget pill on any page for a quick read on what you're looking at. Example shown.
Luuna
(617) 356-0544
Sat 2:15 PM

Luuna heads-up: your accountability partner just passed 80% of their overall weekly budget. A quick check-in could help. Reply STOP to opt out.

Sat 4:40 PM

Your Luuna accountability partner wants to buy at Target over their weekly budget. Reason: "birthday gift". Reply ALLOW 4K7Q to approve ONE purchase, or DENY 4K7Q. Reply STOP to opt out.

ALLOW 4K7Q

Sunday7:30PM

Your week with Luuna
7:30 PM

You kept $58.65 this week and stayed under budget in 3 of 4 stores.

What do one-tap orders cost you in a year?

Move the sliders to match your week. The math runs in your browser and nothing is sent anywhere.

3
$32
What you'd rather spend it on

Your one-tap orders add up to

$4,992

a year. Keep just one in four and that's $1,248 toward a trip.

An estimate from the numbers you entered, not a promise of savings.

Get early access

Why we built Luuna

From Ace and Seth, cofounders

We kept noticing the same thing, in our own accounts and in our friends' (smart people with good jobs): money leaking out in small, fast purchases that nobody would have made after a ten-second pause. Every budgeting tool we tried showed up afterward with a chart. A budget like that is an autopsy. It explains what happened once nothing can change it.

So we built Luuna for the moment before you pay. It keeps your weekly number in view inside the stores you shop and gives you a beat to decide at checkout. We're starting with shopping. Gambling apps come next, because the same one-tap design does more damage there. We're early, and the people in these first cohorts will shape what Luuna becomes.

Luuna beta

Free while we're in beta.

Every feature in the app is open to you while we test it together.

Founding Members

1,000

The first 1,000 people to join become Founding Members and keep a discount on Luuna for life once it opens on the App Store.

Questions

Something else on your mind? Email info@tryluuna.com.

What can Luuna see?

Only what it needs for your budget: the cart, checkout and order confirmation inside Safe Shopping Mode. Never your browsing history, searches or store-account details. Privacy policy

Will it stop me from buying things?

Only if you turn that on. By default Luuna shows you the number at checkout and you decide.

Do I have to connect my bank?

No. Connecting a bank is optional. It lets Luuna count what you spend outside the app, so your weekly numbers stay accurate.

Which stores work?

Amazon and Walmart today, with Target, Starbucks, DoorDash and Uber Eats rolling out during the beta.

When do I get in?
  1. Add your first name and email.
  2. Watch for an invite from Apple when your cohort opens.
  3. Tap "View in TestFlight" on your iPhone.
  4. Install Luuna.
Is there an Android version?

Not yet. Luuna is iPhone only for now.

Your next checkout could be the first one you feel good about.

Join the beta. We open it a cohort at a time, and the first 1,000 people get a discount for life.