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Turn Ideas into Apps: How to Prompt on LastApp.ai

Building apps with AI is mainly about writing great prompts. Essentially, it's your ability to think and communicate clearly about what you want by including key details. This differentiates building a rough prototype vs a production-ready app.

This guide breaks down how to think, structure, and refine your prompts so you can consistently get high-quality apps.

What is Prompting in Vibecoding?

Prompting is the process of describing your app idea to an AI system so it can design, build, and refine your application to your specifications.

Think of it like this:

You are the product manager, designer, and architect. Your prompt is the blueprint. The clearer your blueprint, the better the result.

The most important thing: Mindset

You need to Focus on the What and NOT on the How! So skip writing the Technical requirements and just focus on your Features.

The Anatomy of a Great Prompt

The anatomy of a great prompt - describing your app idea to AI on LastApp.ai

A Great prompt typically has these critical parts:

1. App Overview: Describe what the app is and who it's for

Example: Build an app for nature lovers visiting a park to identify flora and fauna using their phone cameras.

*NOTE: Please avoid using ChatGPT for prompt generation. Do not copy paste auto generated prompts.

2. Core Features: List the key things users should be able to do

Example:

  • Capture or upload photos to identify plants and animals.
  • Display identification results with a confidence score
  • Shows detailed information about the species (Name, description, habitat)
  • Save favorites to collections

3. Determine if User Signup and Login is required

Examples:

  • No login required
  • No login required, save favorites locally.
  • Users can browse without Login but need to login to save favorites to collections.
  • During Signup, capture following user details including First Name, Last Name, Phone number.

* Please Note: During the App Publishing process to the Apple AppStore and Google PlayStore, you will need to declare any user data captured by your App.

4. UI/UX Expectations:

Our AI Agents automatically figure out what Theme needs to be applied to your App based on the description. So you don't need to specify this explicitly.

You can always change the UI Theme for your app in the Project Dashboard > Visuals section.

5. Additional Assets:

If you would like to use specific Assets in your App, you can attach them along with the prompt.

Examples:

  • Custom Images to be used in the App for specific purposes (for instance, 52 images of your Custom Card deck and Back cover)
  • Background image(s)
  • Sounds
  • App Icon

* Please Note: You can change the App icon in the Project Dashboard > Visuals section.

6. Data & Integrations: Specify where the Data is stored. What powers the App.

Examples:

  • Store Data Locally or Store Data on the server.
  • Use location services for nearby results
  • Integrate maps and directions

*Our Agents automatically determine Authentication, Cloud Database, Calendar Scheduler, Fileupload, Infrastructure, App specific models and integrations. You should avoid including these aspects in your Prompt.

** Please Note: During the App Publishing process to the Apple AppStore and Google PlayStore, you will need to declare any user data captured by your App.

Pro Tips for Better Prompts

Weak Prompt

Build an app to identify Plants and Animals.

Strong Prompt

Build an app that helps park visitors identify plants and animals. Users should be able to take a photo with their camera or upload a photo and see what species it is along with information like name and description. Provide ability to bookmark results into collections. Store data locally. No login required.

Be Specific, Not Vague, Not Verbose

Clarity beats length.

Think in Features, Not Screens

Don't think "number of screens". Describe functionality. The identified result should include: name, pictures, description, habitat

Iterate Like a Product Builder

Iterate like a product builder - refining your app with AI changes on LastApp.ai

Your first prompt won't be perfect.

Refine by making changes:

  • Add missing features
  • Fix UI inconsistencies
  • Improve flows

Prompts for some Sample Apps

Fitness Tracker App

Build a fitness tracking app where users can log workouts (sets, reps, weights) and track progress over time. Include pre-built workout plans, reminders, and analytics dashboards.

Expense Tracker App

Create a native personal finance app with expense and income tracking, categorization, and monthly insights. Add support for recurring expenses.

Photo Sharing App

Instagram like photo sharing app. UI needs to look like Instagram. Users should be able to browse without login, To Comment, Like on photos or post photos, users need to login.

Mental Wellness App

Create a wellness app with mood tracking, journaling, and guided sessions. No login required.

Local Marketplace App

Build a native marketplace app where users can buy and sell locally. Include listings, image uploads, chat, and location-based discovery.

Learning App (Flashcards)

Create a Spanish learning app with flashcards, spaced repetition, and quizzes. Include analytics for learning progress.

Pet Care App

Build a pet management app with feeding schedules, medication reminders, and vet tracking.

Home Services Booking App

Build a service booking app where users can schedule home services. Include service listings, time slots, pricing, and reviews. Ensure real-time scheduling and notifications.

Travel Itinerary Planner

Create a travel planning app with itinerary building, day-by-day schedules, and map integration.

Recipe App

Create an AI recipe app. User can input the name of the dish. Look up the top recipes for that dish and create the best recipe using that information. User can input how many people to feed. Adjust and display the corresponding ingredient quantity. No login required.

Event Discovery App

Build a local events app with categories, event details, and location-based discovery.

Inventory Management App

Create a business inventory app where users can track item inventory levels, add items, and get alerts.

Calorie Tracker App

A comprehensive calorie tracking app using AI to track daily calories using meal photos.

Car Maintenance App

Create a vehicle tracking app with service history, reminders, and maintenance logs.

Conclusion

Vibecoding is about compressing the distance between idea and execution, and your prompt is the bridge. The best vibecoders aren't the best coders, they're the best thinkers and communicators.

Treat these as starting points, customize based on your use case and Get Started!

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