Turn research into a one-page brief with seven parts: who you are to the idea, the customer, the pain today, the win, the one core flow, the features ranked by evidence, and what version one leaves out. Paste it as your first message. An AI builder can only build what you tell it.

This is for founders who have done some research and are about to build with an AI app builder. The running example is GroomBook, an imagined booking app for independent dog groomers, carried over from our two-hour market research workflow.

In short:

  • Your research is useless to the builder unless it reaches the prompt.
  • Customer quotes give better requirements than adjectives.
  • One core flow, done end to end, beats ten half-built features.
  • Writing what you leave out stops the AI from guessing.

Research gets lost between notes and the prompt

It is easy to do the research, then type "build me a booking app for groomers". Every insight from the interviews stays in a notebook. The AI builds a generic booking app, because that's what it was asked for.

A brief closes that gap. It turns findings into decisions the builder can follow, in one page you can paste.

The brief has seven parts

Each part answers a question the builder would otherwise guess.

  1. State your relationship to the idea: owner, customer, or founder building for many.
  2. Name the customer exactly, with a size limit.
  3. Describe the pain today: the workaround and what it costs.
  4. Define the win in a way you could measure.
  5. Write the one core flow, step by step.
  6. Rank the features by how much evidence supports each.
  7. List what version one leaves out.

Add the look at the end: two or three words for the mood and any brand colours you already use.

A worked brief for GroomBook

Here is the full brief, short enough to paste into a chat. Every line comes from research, and the sources are listed below the brief for you, not for the builder.

I'm building this for groomers everywhere (founder).
              Customer: solo dog groomers and shops with 1 to 5 staff, UK.
              Pain: bookings come by text and calls while their hands
              are busy. Missed messages mean lost bookings and no-shows.
              Win: a groomer fills next week's diary without a phone call.
              Core flow: owner opens a link, picks a service and a slot,
              pays a deposit, gets a reminder the day before.
              Must have: deposit at booking, reminder text, dog notes
              (breed, temperament).
              Leave out: staff payroll, stock, a marketplace.
              Look: friendly, clean, warm colours.

The "deposit" feature came from reviews of two rivals, where no-shows were the top complaint. "Dog notes" came from four of six interviews. "Leave out: marketplace" came from the teardown: groomers don't want to be listed next to rivals.

Quotes beat adjectives

"Easy to use" tells the builder nothing. "I'm holding a wet dog when the phone rings" tells it a lot: big buttons, a booking link the owner can use alone, and reminders the groomer doesn't have to send.

Add two or three short customer quotes under the brief. They help the builder pick sensible defaults for wording, layout and priorities.

Rank features by evidence, not by wish

Score each candidate feature by how many sources support it. For GroomBook, deposits, reminders and dog notes make version one, and the rest waits.

Feature Interviews (of 6) Reviews mentioning it Version one?
Deposit at booking 5 Many Yes
Reminder text 4 Many Yes
Dog notes 4 Some Yes
Loyalty stamps 1 Few No
Staff rota 0 None No

A feature with one fan and no reviews can wait. Building it now costs time and makes the core flow harder to see.

One core flow, end to end

The core flow is the shortest path from opening the app to the win. For GroomBook: pick a service, pick a slot, pay a deposit, get a reminder.

Ask for that flow to work end to end before anything else. A booking that saves, shows in the groomer's diary and survives a reload proves more than five pretty screens. Our guide to building an app with AI covers how to test each slice.

Write down what version one leaves out

AI builders fill gaps with features. If you don't say "no payroll", you may get a payroll tab. A short "leave out" line keeps the first version focused and quicker to test.

Leaving something out of version one isn't a rejection. It's a decision to test the core idea first. Keep the list. It becomes your roadmap once users ask for those things.

How GrowApps uses the brief

GrowApps starts a new app by asking about your relationship to the idea, the problem today and the win you want (build your first app).

It then researches apps like yours, asks which goals and first-version features matter to you and which colour palette fits, and designs up to five key screens. Nothing is built until you approve the screens. A brief like GroomBook's answers most of those questions up front.

Write your brief in ten minutes

Copy the seven parts into a note. Fill each with one line, using a real quote where you have one. If a line is empty, that's the research you still need, so book an interview or read twenty reviews before you build. Then read our guide to MVP app development.

Frequently asked questions

How long should an app brief be?

One page, or about 150 to 300 words. Long enough to state the customer, pain, win, flow and exclusions. Longer briefs bury the important lines and make the builder treat everything as equally important.

Should I include competitor names in the brief?

You can, if you say what to learn from each, such as "rivals don't take deposits". Don't ask the builder to copy a rival's design. Describe what your customer needs instead.

Sources and further reading