The decisions AI cannot make for you
An AI can write the code for your idea in minutes. What it cannot do is choose the idea, the audience, the scope or the build order. When those questions are unanswered the model answers them its own way: it adds screens you do not need, invents fields you never use, and hands you a demo that collapses the moment a real user touches it.
A useful app prompt is really a written summary of those decisions. Six blocks are enough:
- User and problem. "Salon clients who do not want to call to book." Without this, screen design is a lottery.
- V1 scope. Three screens working beat seven half-built.
- Screens and flow. What the user sees at each step, in order.
- Data and permissions. What is stored, who sees it, who can change it.
- Stack. Web or mobile, with what technology, hosted where.
- Acceptance criteria. What a real user must be able to do before it counts as done.
Examples by app type
| Type | What the prompt must nail down |
|---|---|
| Booking (salon, court, class) | Time slots, availability, cancellations and email or SMS reminders. |
| Catalogue or store | Products, variants, cart, payment provider and shipping calculation. |
| Community or club | Signup, roles (admin, member, guest) and what each role can do. |
| Internal dashboard | Data being imported, per-person permissions and exports. |
| AI-powered tool | What the user inputs, what the AI returns, and what happens when it is slow or fails. |
From idea to prompt in 15 seconds
- Write your idea the way you would tell a friend. It does not need to be technical.
- Hit "Generate my prompt for free" and wait 5-15 seconds.
- Copy the result and paste it as the first message in whichever AI you use.
If you have not picked a tool yet, publishing your app covers browser builder versus editor, and the Inputo wizard recommends a stack for your case.
What to check before writing a line of code
Validating the idea is usually cheaper than building it. Before generating the app, answer: who has this problem and how do they solve it today? What counts as success in the first few weeks? What can you show working without spending a month? The answers change the prompt: an app built to test pricing is built differently from one built to retain customers.
Keep going with the generator
Frequently asked questions
What do I ask an AI to build me an app?
A prompt that settles user, problem, v1 scope, screens, data with permissions, stack and acceptance criteria. That is the difference between a good-looking demo and something usable.
Does the same prompt work for ChatGPT and for an app builder?
Yes, with one nuance: with ChatGPT you ask for the plan or the code, with a builder you ask it to execute. A structured prompt works for both because it describes your product, not the tool.
Can I build an app without knowing how to code?
Yes, with browser builders (Lovable, Bolt, Replit) that generate and publish the app. What you still need is deciding what gets built — that is what the prompt gives you.
How long does an AI-built app take?
A first usable prototype: an afternoon. Something you can show real customers, with permissions, copy and coherent data: several days of iteration. The bottleneck is almost never the code.
Which app should I build first?
The one you can show working within days and that answers a specific question about your business. Start with one screen that solves a real problem, then extend.
Is the prompt generator free?
Yes — no signup, up to 8 prompts per hour per IP. The seven-step wizard for the full plan also starts free.