How to describe your app to AI: a prompt template
Write a clear AI app-builder prompt with a copyable template, a practical example, acceptance checks, and focused follow-up edits.
AppX team ·
A useful AI app-builder prompt names the intended user, the first task, the screen, and the behavior you expect. It also states the data to use and the features to leave for later. Those details give you a first version you can inspect, test, and improve.
Copy the template below, then use the example and acceptance checklist to make your own brief concrete. If you are turning a client's paragraph into a reviewable prototype, start with how to turn a client brief into a mobile app prototype.
Start with one user and one completed task
"Build a community app" leaves almost every product decision open. Is it for neighbours, volunteers, customers, or staff? Does the first screen help someone find an event, send a message, or join a group? A builder may make reasonable choices, but they may not be yours.
Replace the category with a single user doing a single task. Then name the visible result. For example, "a parent chooses a pickup slot and sees it reserved" is testable. "A helpful school app" is not.
For a first version, describe only the path you want a person to finish. Supporting roles, payments, sign-in, notifications, integrations, and a backend may be important later. They also change the shape of the work. Put them outside the first brief unless the first task cannot exist without them.
Use this bounded app brief template
Copy this template and replace the brackets. Keep the facts concrete. If you do not know an answer yet, write a question for your next decision instead of letting it become an accidental feature.
Build a [number]-screen mobile app for [specific user].
The main task is: [one action the user completes].
On the first screen, show [information or controls].
When the user [tap, type, select, or submit], [observable result] should happen.
Use [two or three visual qualities], with [accessibility or layout need].
For this first version, use [local/mock data or other stated data boundary].
Do not add [features deliberately out of scope].
I will consider this version successful when [short acceptance result].
The last two lines carry real weight. A data boundary prevents a visual prototype from implying that a real account, payment, or calendar system exists. A scope boundary makes it easier to see whether the main path works before adding more screens.
Example: a basketball-game RSVP
Here is an illustrative brief. It is a writing example; it was not generated or tested on a device.
Build a one-screen mobile app for people joining a weekly neighbourhood basketball game.
The main task is choosing this Thursday's game and confirming attendance.
Show the game time, court name, number of places remaining, and a list of confirmed players.
Use six places in total, five mock confirmed players, and a fixed local current-player name, Alex.
Start with one place available. When Alex taps "I'm in", add Alex once to the confirmed list and reduce the places remaining by one.
When all places are taken, replace the action with a disabled "Game full" button. Repeated taps must not add duplicate players.
Use an energetic but uncluttered style, strong contrast, and a large primary action.
For this first version, use local mock data only.
Do not add login, payments, chat, push notifications, player profiles, a waitlist, or more screens.
I will consider this version successful when a person can confirm attendance, see the player list change, and see the full-state message.
This says what to render, what to change, and what edge case to inspect. It does not ask the first version to solve invitations, identity, or scheduling. Those are valid later requirements, but they need their own decisions.
Paste your adapted brief into AppX's app description field. The landing form keeps the text through the sign-in handoff, so you can begin with the scope you wrote instead of recreating it afterward.
Check the result against the brief
Treat the first result as a draft to review, not proof that the app is finished. Use the success sentence in your brief as an acceptance check. For the pickup-game example, check the following:
- The initial screen shows five confirmed players and one remaining place out of six.
- Tapping "I'm in" adds Alex once and changes the remaining-place count to zero.
- The disabled "Game full" state appears, and repeated taps cannot add Alex again.
- The main action, time, and location remain readable at phone size.
- No out-of-scope feature appears to work when it only has a visual placeholder.
For a phone-specific review, use the project’s available preview path and read how AppX uses Expo Go previews. A canvas or browser view can help you review layout, but it does not establish that a specific project works on a phone. Check the actual project and record any failure before you show it as accepted.
Make one focused edit at a time
Once you can name the problem, ask for one constrained change. Preserve the behavior that already passed so the next check has a stable baseline.
Make the confirmed-player list easier to scan on the existing screen.
Keep the game time, court name, RSVP behavior, remaining-place count, and full-state behavior unchanged.
Do not add a second screen, chat, login, or notifications.
Useful edit prompts name both the requested change and the parts that must stay true. "Make it better" is hard to verify. "Increase the primary action contrast; keep the current RSVP state changes" gives you a clear before-and-after check.
Fix common prompt mistakes by clarifying scope
The usual mistake is asking for a category, then trying to correct ten guesses at once. Begin with the core path. Add a second screen only when the first path requires it. Avoid vague quality words such as "modern" unless you pair them with something visible: calm, dense, playful, high contrast, large text, or minimal controls.
Another mistake is treating a missing decision as a feature request. If you do not know whether a confirmed place should remain after the app closes, say so. Ask for the local behavior you want for the first review, then decide whether persistence needs account and data work. If a requirement changes data ownership, permissions, money, or another user role, stop and scope that change separately.
Finally, do not promise a client that a preview equals a store-ready product. Review the main workflow, the layout, failures, accessibility needs, and the later engineering questions separately. When you want to understand continuing work and source access, see the current ownership information.
Bring one real idea to AppX, make the first task observable, and use the acceptance check to guide the next edit.