Borel for founders validating an idea

Validate your app idea with a real iPhone app

Borel lets founders test an app idea with a working native iPhone app instead of slides or a mock-up. Describe the product, try it on a live iPhone in your browser, and publish it to the App Store to see whether people download it, sign up and come back.

Who it's for

Is this you?

  • First-time founders with an idea and no technical co-founder yet.
  • Founders who want real users in the App Store before they raise or hire.
  • Product people inside a company who need a working pilot, not a deck.

App ideas

Apps to make, with a prompt for each

Paste a prompt into Borel as it is, or change it to fit. Borel builds it while you watch.

  • A marketplace's first version

    Listings, a detail page, sign-in and a way to get in touch.

    Prompt
    Make the first version of a marketplace for second-hand bikes in my city. Sellers sign in and post a bike with photos, size, price and area. Buyers browse by size and price, open a listing and send the seller a message inside the app. Keep the look clean, with a green accent.
    Use this prompt
  • A subscription app

    A free taste, then a paywall with Apple's in-app purchase.

    Prompt
    Make a meal planning app with a free week and a paid plan. The free week has three recipes a day. A monthly subscription, sold with in-app purchase, unlocks every recipe, a weekly shopping list and favourites. Show the paywall after the free week with a clear list of what is included.
    Use this prompt
  • An AI assistant for a niche

    A focused assistant that knows one job, with its own history.

    Prompt
    Make an assistant app for landlords. They sign in, describe a problem with a tenancy in plain words, and AI drafts a polite, clear message to send to the tenant. Keep each conversation in a history list, and add a button to copy the draft.
    Use this prompt
  • A waitlist and onboarding flow

    Three screens that explain the idea and collect sign-ups.

    Prompt
    Make an app that introduces my idea in three swipeable onboarding screens with a bold picture each, then asks people to sign up with email and answer two questions about how they would use it. Show a thank-you screen with their place on the waitlist.
    Use this prompt

What Borel handles

The hard parts, taken care of

Every app is native Swift, written and built for you. These parts come with it, with nothing to set up.

  • Accounts

    Sign-in with email and password from the first version, so your first users have real accounts.

  • A database

    A cloud database and file storage Borel runs: listings, messages and uploads with no server to set up.

  • AI

    Borel AI with no API key, so an AI feature is part of the first test, not a later project.

  • A live iPhone preview

    A live iPhone in your browser, free on every plan, to demo it to a co-founder or an investor on a call.

  • Install on your iPhone

    Borel Companion puts the app on your own iPhone, with Pro, so you can hand it across the table.

  • Publish to the App Store

    Borel builds, signs and uploads it to the App Store under your company's account, with Pro.

Borel makes iPhone and iPad apps, not Android apps. App Store publishing needs Apple's Developer Program ($99 a year), and Apple reviews every version, so plan a few days for review.

Frequently asked questions

It is a real native app written in Swift with SwiftUI, with real accounts, a cloud database and in-app purchases, published to the App Store under your own account. You can launch the first version and keep building on it, one change at a time.

They can take over: you can download the app's SwiftUI code at any time and open it in Xcode. The app stays under your own App Store Connect account.

Yes, for digital products and subscriptions: Apple's In-App Purchase is fully supported, and Borel sets it up with the app.

Start free with 5 credits a day and the live iPhone, free on every plan. Publishing to the App Store comes with Pro, plus Apple's $99 a year for its Developer Program.

Describe your app

Start from one of the prompts above, or say it in your own words. Trying it on the live iPhone is free.