Lovable AI tutorial for beginners: build your first app from a prompt

Imagine turning an app idea in your head into something real on your phone, without touching a line of code. That’s exactly what Lovable lets you do. You describe what you want in plain English, answer a few follow-up questions, and Lovable builds the app for you.

In this guide, you’ll walk through building a simple but powerful app: you speak your to‑do list, and it automatically turns those tasks into events on your Google Calendar. Along the way you’ll learn how to write a good prompt, refine your app, handle real user sign‑in, and publish it as an installable app icon on your phone.

Getting started with Lovable

First, create your Lovable account. Head to the Lovable homepage, click the Get started button in the top-right corner, and sign up with your preferred provider. Once you’re in, you’ll land in the main workspace.

Here’s a quick tour of what you’ll see:

Left side menu:

• A Home button that always brings you back to the main screen.
• A list of your recent chats/projects so you can jump back into anything you’ve built.
• Your profile icon, where you can adjust account settings.

Center/right pane:

• A large prompt box where you describe the app you want to build.
• A template library below the prompt, full of pre-made app ideas you can customize.
• A visual list of your existing projects once you’ve started building.

Lovable is a web app builder, but with a few extra steps you can make your app feel like a native mobile app, complete with an icon on your phone’s home screen.

What you’ll build: a voice-to-calendar to‑do app

The example app solves a familiar problem: you have a bunch of tasks bouncing around your head, and by the time you reach your to‑do list, you’ve already forgotten half of them. Instead, you’ll build a simple web-based mobile app where you:

• Tap a microphone button
• Ramble your to‑do list out loud
• Approve the detected tasks
• Automatically add them to your Google Calendar

Everything starts with a good prompt. Before you type anything, you should be clear on three things:

1. The goal: What problem does the app solve?
2. The user flow: How does a user move through the app, step by step?
3. The design feel: Roughly how should it look and feel?

How to write your first Lovable prompt

To get the best results, switch Lovable to Plan mode before sending your first prompt. You’ll find this under the menu labeled Build. Plan mode makes Lovable think through the structure of your app before it writes any code.

When you write your prompt, include these core pieces:

1. Define the goal clearly

Start with a simple, one-sentence description of what the app does. For example:

“Build a web-based mobile app that lets a user record voice notes on the go and automatically turns them into 30-minute tasks on their Google Calendar.”

This tells Lovable the purpose and the platform (web-based, mobile-friendly).

2. Describe the user flow like a story

Next, describe how a user moves through the app in plain language. Think of it as a short narrative:

• The user opens the app and sees a big microphone button.
• They tap the mic, speak their tasks, then tap stop.
• The app shows a list of detected tasks and suggested times.
• The user confirms or edits the tasks.
• The app adds the approved tasks to Google Calendar.

Use phrases like “once recorded, do X” and “then show Y” to make the flow clear.

3. Add constraints and assumptions

Constraints help Lovable make decisions without guessing. For example:

• “Assume each task is 30 minutes long.”
• “Hard-code a specific Google account for now for simplicity.”
• “Don’t schedule tasks in the past.”

These details keep the first version of your app simple and predictable.

4. Describe the design style

You don’t need to be a designer. Use simple, high-level words for the look and feel, such as:

• “Clean, minimal, modern.”
• “Mobile-first layout.”
• “Large, clear buttons and readable fonts.”

If you have brand colors or fonts in mind, mention them here too.

5. Ask Lovable to ask you questions

Humans are usually vague in their first attempt at a prompt. To help with that, add a line like:

“If anything is unclear, ask me follow-up questions before building.”

Lovable will then ask you questions about visuals, functionality, and technical choices. Just answer them as best you can. This back-and-forth helps the AI narrow in on what you actually want.

Reviewing and approving the app plan

After you answer the initial questions, Lovable generates a detailed plan. It typically includes:

• A non-technical overview of what the app will do
• The main screens and user flow
• Design notes
• Technical implementation details

If you’re not technical, focus on sections like look and feel, screens and flow, and how it works. If something looks off, type your corrections into the prompt box and let Lovable update the plan.

Once it looks right, click to approve the plan. Lovable will then start building the app.

Connecting Google Calendar

Because this app needs to create calendar events, you’ll connect your Google Calendar through Lovable’s built-in connector.

At some point during the build, you’ll be prompted to connect Google Calendar:

• Click the Connect button when it appears.
• Sign in with your Google account.
• Link that account to the current project.

Once connected, Lovable can add events to your calendar when your app runs.

Testing your first version

When Lovable finishes building, you’ll see a live preview of your app on the right side of the screen. You can:

• Click the mic button and speak a few tasks.
• Wait for the app to transcribe and show them as tasks.
• Approve them and let the app add them to your calendar.

Check your Google Calendar to confirm that the events were created. This first version might be rough, but that’s expected. The power of Lovable is in how quickly you can iterate.

Refining scheduling logic with prompts

As you test, you’ll notice things you want to change. For example, maybe tasks are scheduled starting at the exact second you spoke them, which looks messy on your calendar.

You can fix this with a simple prompt, such as:

“Change the scheduling logic so tasks start at the nearest 15-minute increment, never in the past and not at the exact current time.”

Lovable will update the code and redeploy the app. Test again to make sure tasks now land on clean 15-minute slots.

Letting users say dates and times in natural language

The next improvement is to let users say when tasks should happen in their own words. For example:

• “I need to call Kevin tomorrow at 10 a.m.”
• “Pick up dry cleaning Friday afternoon.”
• “Block an hour to prep for the client call next Tuesday morning.”

To support this, add a new feature in your prompt:

“Allow the user to specify in their voice when the task must be done and how long it takes, using natural language like ‘tomorrow at 10 a.m.’, ‘Friday afternoon’, or ‘next Tuesday morning’.”

Then, give Lovable clear rules and examples, such as:

• “Morning means before 11 a.m.”
• “Afternoon means 1–4 p.m.”
• “Evening means 6–9 p.m.”
• “Next Monday” should mean the upcoming Monday, not the one after (or define your own rule).

The more explicit you are about how to interpret these phrases, the fewer iterations you’ll need later.

Debugging issues with screenshots and Plan mode

Sometimes, even with good instructions, you’ll see bugs. For example, your app might interpret “10 a.m.” as “3 a.m.” or schedule things in the wrong time zone.

A practical way to debug is:

1. Take a screenshot of the problem (for example, the wrong times shown in the UI).
2. Paste the screenshot into the Lovable prompt box.
3. Explain what’s wrong in plain English, such as: “These times look off by about seven hours, which suggests a time zone issue. Fix the time zone handling so events match my local time.”

For bigger changes, switch back to Plan mode so Lovable can rethink the architecture. If the new plan looks too technical, ask:

“I’m non-technical. Can you explain this plan in simple language?”

Lovable will walk you through what it’s doing in more approachable terms.

Adding real user sign-in and calendar access

So far, you may have hard-coded your own Google account to keep things simple. That’s fine for testing, but not for sharing the app with others. Before you publish, you’ll want each user to connect their own Google Calendar.

You can prompt Lovable to handle this, for example:

“Switch from using my Google Calendar to letting each user sign in with their own Google account and connect their own Google Calendar. Walk me through any steps I need to do outside Lovable.”

Lovable will then guide you through setting up authentication and permissions. Some of this may involve configuration in external dashboards, but the AI will outline each step.

Running a security scan

Before publishing, Lovable can run a deep security scan on your app’s code. This is especially important for AI-generated apps, which can accidentally introduce vulnerabilities.

From the publish flow, you’ll see an option to run a security scan. After it finishes, you can:

• Review any issues it found.
• Use the Try to fix all button to let Lovable patch them. These fixes don’t cost extra credits.

Even if you’re just experimenting, getting into the habit of scanning and fixing security issues is a good practice.

Publishing your app

When you’re ready to share your app or use it on your phone, click the Publish button in the top-right corner of the Lovable interface.

The publish flow walks you through a few steps:

1. URL: Lovable gives you a free URL. You can customize part of it. For a fully custom domain, you’ll need a paid plan.
2. Visibility: Choose whether the app is public or restricted. If you’ve set up authentication, you can safely keep it public so only signed-in users can access their data.
3. Metadata: Adjust the title, description, and social image that appear when you share the link.

After confirming everything, click Publish. Your app is now live and accessible through that URL.

Making it feel like a real mobile app (PWA)

When you open the published app on your phone, it still runs in the browser with the URL bar visible. To make it feel like a native app, you can turn it into a Progressive Web App (PWA).

You don’t need to know the technical details. Just prompt Lovable with something like:

“Make it so I can install this as an app icon on my phone. Use a teal microphone for the app icon.”

Lovable will add the necessary PWA configuration. You’ll know it worked when you see references to “PWA” in the plan or code and a notice that the app can be added to the home screen.

Then:

1. Go back to the Publish section and click Update to republish with the new PWA settings.
2. On your phone, open the app’s URL in your browser and refresh the page.
3. Tap the Share icon and choose Add to Home Screen.
4. Confirm the name and icon, then tap Add.

You’ll now see the teal microphone icon on your home screen. Tap it, and the app opens full-screen, just like a native app, without the browser chrome.

Next steps and what to explore next

In a relatively short time, you’ve gone from an idea in your head to a working, installable app that:

• Listens to your voice
• Extracts tasks and times
• Schedules them on Google Calendar
• Lets each user connect their own account
• Passes a security scan
• Lives on your phone as an app icon

From here, you can keep iterating: add categories or tags to tasks, send reminder emails, or integrate with other tools. If you enjoy this kind of no-code building, you might also like exploring how other platforms combine AI and visual builders, such as the walkthrough in this no-code tutorial for beginners using Base 44 and AI.

And if you want to go deeper into how AI agents and skills work behind the scenes, check out this guide to AI agent skills and building your first skill. Together with Lovable, these tools make it easier than ever to turn ideas into working software without becoming a full-time developer.