Prove demand before you build.
Avoid months of building the wrong app. Test buyer intent first. Then speedrun toward product-market fit.
One app idea included in the trial.
We're validating Will it sell with Will it sell.
We're running the same funnel and ad test we ask builders to run. When the campaign is live, we'll publish the spend, sample size, checkout-intent rate, interval, and verdict here.
When the campaign is live, this ledger should show spend, sample size, checkout-intent rate, confidence interval, and verdict — not a vanity counter.
Shipping is cheapnow. Being wrong isn't.
AI tools let you build anything in a weekend — so everyone does, and 90% ships to crickets. The expensive mistake was never the code.
“I spent 4 months building an app nobody wanted.”
Validate the idea, not the code.
Test demand with a real funnel before writing a line of Swift, Kotlin, or React.
Measure money, not opinions.
Surveys are easy to answer politely. Checkout intent is harder to fake.
Decide with data.
A statistical verdict against real web2app benchmarks, not a gut feeling.
Idea in. Verdict out.
Describe your idea. We generate and host a funnel with AI Meta ads. Real traffic clicks. You get a verdict against real web2app benchmarks.
Describe your idea
One sentence in. The AI checks pain severity, market size, willingness to pay, and ad reachability before you spend a dollar.
We host the funnel + ads
A hero → testimonial → paywall funnel with AI Meta ad angles and tracked links, generated and hosted for you. No tools to stitch together.
Read the verdict
Real traffic clicks. You get BUILD IT / PROMISING / NEEDS-WORK vs web2app benchmarks — with sample size and interval, so weak signals can't hide.
checkout-intent rate · 95% interval 2.8%–4.3%
A live funnel, minted from one sentence.
Hosted landing page, generated imagery, testimonials, a working checkout, and ready-to-run Meta ad variants — a shareable URL the moment it generates.
Hosted landing page
Generated imagery, testimonials, and copy — a shareable URL the moment it generates.
Ready-to-run Meta ads
Hooks, primary text, creative prompts, and tracked links so each ad lands in the right column.
A working checkout
Real pricing, a real decision, and no customer charge in validation mode — the closest signal to revenue before launch.
Mockups lie. Checkout clicks don't.
Surveys measure politeness. Waitlist tools measure curiosity. Will it sell measures the only signal that survives contact with a wallet: visitors see your real pricing and decide whether to commit, exactly like the app already exists.
In validation mode, no payment is taken from the visitor. The signal is the decision: visitors who move toward checkout are telling you they were ready to pay. They see the app is coming, join the launch list, and you learn the only thing that matters: would they buy?
Fake door, real signal.
Visitors hit a genuine checkout, then a transparent “we're not live yet — claim your spot” moment. No payment is captured in validation mode, and the reveal screen makes the status explicit.
You won't be charged.
This app is being validated before launch. Your checkout intent tells the maker there's demand, and you can join the list to be notified when it ships.
Everything you need to prove demand, built in.
AI validation funnels, real buyer-intent tracking on checkout clicks, AI-written Meta ads, Stripe Connect for sellers, the BUILD IT verdict vs benchmarks, and an MCP server so your agent does it all.
AI idea check
Scores your pitch through a paid-acquisition lens and suggests stronger directions before you spend on ads.
Instant funnel
A polished multi-step product funnel — hero, walkthrough, testimonial, pre-registration, paywall — generated and hosted for you.
Ad angles & creatives
Multiple tested ad hooks with AI-generated images and paste-ready Meta copy. Up to 50 assets/month.
Buyer-intent paywall
Real pricing, a real decision, and no customer charge in validation mode. The strongest signal short of launching.
Pre-registrations
Capture emails from interested visitors — your launch-day waitlist builds itself while you validate.
Verdict & insights
Statistical verdicts with confidence intervals, segment sweeps (ad × source × country), funnel drop-off, and audience answers.
Tracked links
Every creative gets its own link, so each visit and checkout attempt lands in the right report column.
Test up to 5 ideas at once
Run parallel experiments, kill the losers fast, and double down where the data says BUILD.
Meta campaign autopilot
Connect your ad account and Will it sell builds the campaign for you — paused until you hit Publish — and syncs spend back automatically.
Your AI agent can validate for you.
The Will it sell MCP server plugs into Cursor, Claude, bolt and lovable — so the moment your agent goes to build something, it spins up a funnel, runs the ads, and checks the verdict first.
The right benchmark, every time.
Will it sell counts checkout intent against real web2app benchmarks — the closest thing to revenue you can get before launch.
Will it sell
- Buyer intent
- Generated funnel + ads
- Verdict with interval
Waitlist tools
- Email interest
- You write the page
- No pricing signal
Surveys
- Opinions
- Easy to answer politely
- Weak buying signal
DIY Meta test
- Can work
- Manual setup
- You stitch data together
Validate for the price of one bad weekend.
Start with one trial idea, then choose monthly or yearly when you want to keep testing.
Every trial requires a card and is limited to one app idea.
Trial included, not a free plan
Choose monthly or yearly at signup. Billing starts after the trial unless you cancel before it ends.
Pro
14-day trial, card required
For serious validation before you commit months to building.
Create first test- 14-day trial includes 1 app idea
- Test up to 5 app ideas once subscribed
- Buyer-intent paywall — test prices & payment intent without charging
- Market-research quiz — price, must-have features, who's buying
- Verdict engine + audience insights
- 50 generated ad assets per month
Grow
COMING SOONAnnual billing option planned
For when the verdict says BUILD — and it's time to sell.
- Everything in Pro
- Real paywall — sell online with a Stripe checkout
- Entitlement API — verify purchases from your app
- Up to 15 app ideas
- 500 generated ad assets per month
The questions every builder asks first.
Card-backed trial, one idea included, monthly or yearly after that.
You don't need the app — you need the demand signal. Will it sell generates a funnel, Meta ad angles, tracked links, and a verdict report. You send a small paid-traffic test to the funnel and watch whether strangers move toward checkout.
It's a pricing screen where visitors decide whether they would buy. In validation mode, the checkout action records intent and routes them to a reveal screen explaining the app is being validated before launch. They can then join the notification list.
A one-sentence idea and a small ad budget. Most early reads can start with $50–150 in Meta spend over 3–5 days, then you can extend the test if the signal is promising but the sample is still thin.
We measure every step of the funnel: ad click, page engagement, signup, paywall view, and checkout intent. The report shows the conversion rate, sample size, confidence interval, segment breakdowns, and a clear BUILD IT / NOT VIABLE recommendation.
No. There isn't a forever-free plan. New accounts start with a 14-day trial that requires a card and is limited to one app idea. Choose monthly or yearly at signup; billing starts after the trial unless you cancel.
You can create one validation funnel, generate ad angles, capture waitlist interest, and see how the workflow fits your idea. Pro unlocks more ideas, buyer-intent paywalls, market-research questions, and the full verdict workflow.
Yes. The trial is card-backed. Choose monthly or yearly when you start; cancel before the trial ends and you won't be charged.
One generated ad creative — an AI image plus paste-ready Meta copy for a specific angle. Pro includes 50 per month, which is plenty to test several hooks across multiple ideas.
That's coming with the Grow plan: a real Stripe checkout and an entitlement API so you can sell and verify purchases from your app the moment the verdict says BUILD.
No code required. You bring the idea; Will it sell builds the funnel and ad angles. You'll still need to launch or connect the ad campaign, but the checklist keeps the setup concrete.
Any app idea — iOS, Android, or web. You're validating demand for the concept, so the underlying platform doesn't matter at this stage.
Always. Choose monthly or yearly billing; cancel before your trial ends and you won't be charged. No fine print, no retention games.
You should still review your ad copy and funnel against Meta's current policies and your local rules. The product is designed to avoid collecting payment during validation, but it doesn't replace legal or platform-policy review.
Don't build it on faith. Build it on data.
Create the funnel. Run the ads. Decide with evidence.