How to Make a Fitness App with AI in Just Five Steps

TL;DR: To build a fitness app, pick a category (workout, gym and studio, nutrition, wellness, or all-in-one) and decide whether studio software you can buy would do the job. Choose the few features your clients need first and how you’ll make money, then build the app and test it on real devices. Before you submit, collect only the health data you need and check your privacy disclosures and in-app purchases against Apple’s and Google’s current rules.

A fitness app gives your training method, studio, or wellness practice a home your clients can open every day. They can follow your programs, log workouts, book sessions, and track their progress in an experience built around how you work.

Many coaches and studio owners start with the app that comes with their booking software. It works, but it looks like every other gym’s app and rarely fits the way you train. With a custom app, you shape the experience around your expertise and your clients’ needs, and you can change it as your business changes.

This guide walks through each decision in the order you’ll make it, from picking an app type and deciding whether to build at all to building with AI and visual editing and getting through app store review.

Types of fitness apps you can build

To build a fitness app, first decide what type of app you need and whether a custom build makes sense. From there, you plan your features and how you’ll make money, then build and launch it. The type of app comes first because each one needs different core features. A studio app centers on booking, for example, while a nutrition app centers on meal logging.

Workout and exercise apps

A workout app helps clients log their training and follow your programs, whether that’s tracking sets and reps or working through a plan week by week. If you’re a personal trainer who wants clients to keep training between sessions, this is likely your fit.

Gym and studio apps

A gym or studio app is where members book classes and manage their memberships. It’s a good fit if you have a physical location and want members to stay engaged between visits, with at-home workouts or a members-only community feed.

Diet and nutrition apps

A nutrition app helps clients log meals and track macros against their goals. If you’re a nutritionist or coach whose clients care most about what they eat, this is likely your fit.

Wellness apps

A wellness app supports everyday habits like sleep and hydration, without making medical or clinical claims. Yours might offer recovery check-ins or guided mindfulness sessions. The health data section covers what to plan for if you collect any health information.

All-in-one fitness apps

An all-in-one app combines workout tracking, nutrition, and community in a single product. You don’t need all of it on day one, though. A strength coach, for example, might launch with workouts and logging, then add meal plans once clients are in the habit of opening the app.

Once you know your category, the next question is whether building your own app is right for you.

Who should build a fitness app?

A fitness app tends to make the most sense for four kinds of businesses:

• Personal trainers and coaches: Your programs can reach clients far beyond the people you train in person, and you can see how each one is progressing.
• Gym and studio owners: Members can book classes and keep training at home between visits, so they stay part of your community.
• Nutritionists and wellness coaches: Share meal plans and check in with clients between appointments, so you know how they’re doing before they walk in.
• Fitness influencers and content creators: Bring your programs and community into one place you own instead of spreading them across platforms.

Build or buy: The best way to create an app for a gym, studio, or wellness business

If you mostly need scheduling and payments, software you can buy may cover it. A custom app is worth it when your programming, brand, or client experience is what people are paying for.

When off-the-shelf studio software is enough

Many studio platforms are built for exactly that. When someone only opens the app to book a bike or pay for a drop-in class, the white-label app from your booking provider is usually the cheaper way to go. If you’d rather build your own booking flow, see how to build an appointment booking app.

When a custom fitness app is worth building

A custom app pays off when the way you coach is what sets you apart. You decide what the app does and how it looks. For example, you can:

• Go beyond simple subscriptions: Offer a monthly plan and a one-off 12-week program in the same app.
• Build direct relationships with your users: Run challenges and chats in your app instead of a social media group you don’t control.
• Differentiate with the exact tools your audience needs: A running coach could track weekly mileage instead of generic sets and reps.

Choosing an approach by business type

A solo online coach and a multi-location gym need very different apps. Start with what your clients will do in the app most often, then find your business type in the table.

If you go custom, Bubble lets you build the app yourself and keep improving it as your business grows.

What features does a fitness app need?

Every fitness app is different, but a few core features show up in almost all of them. Think of these as your foundation to build on as your app grows.

Core user features

• User profiles and goals: Clients sign up, set a goal, and add details like age and weight, so you can tailor their plan and measure progress from where they started.
• Workout logging: Make it quick to log sets and reps. If it takes more than a few taps mid-workout, people stop bothering.
• Progress dashboards: Show each client their history and stats over time. Watching a squat number climb over six weeks keeps people coming back.
• A content library: Put your workout videos and plans in one place, sorted by goal or level, so clients can find the right program on their own.

Community and engagement features

• Social connection: Let clients cheer each other on. A simple feed of finished workouts, with likes and comments, can turn solo training into something people do together.
• Notifications: Nudge clients before a session or when they hit a milestone. A reminder the night before a booked class works better than a generic daily ping.
• Gamification: Badges and streaks give clients a reason to log one more session when motivation dips.

Clarifying your fitness app idea

It’s tempting to start building right away, especially when AI can get you a first version fast. A little planning up front keeps that first version focused. If you’re building with the Bubble AI Agent, it plans the app with you before it builds anything. The clearer your idea, the closer its first try lands.

Go back to the core features above and sort them into must-haves and nice-to-haves. Then name your app’s main job, like tracking workouts or supporting weight loss, since that job decides which features come first.

Before you build, settle three things:

• What distinguishes your idea from existing fitness apps: This shapes who you’re building for and which features get the most attention.
• Your central features and how people will use them: A short must-have list keeps you from building too much at once and helps you compare tools.
• Where your app will be available: Web, iOS, and Android each change how you build, so decide early which ones your clients need.

What distinguishes your idea from existing fitness apps?

There are a lot of workout apps out there, so it helps to know exactly what makes yours different. That answer points you to your audience and tells you which features matter most.

Your edge doesn’t have to be a feature, either. It might be:

• Your expertise: If you’re a well-known coach with a library of meal plans or exercise videos, the content is the product, and the app’s job is to deliver it well.
• Your audience: Maybe you’re building for people current apps overlook, like new parents or adaptive athletes. Their needs decide what you build first and what you add next.
• Solving an existing pain point: Maybe current apps frustrate your clients with clunky logging or programs that ignore the equipment they have. Fixing that becomes the feature you lead with.

What are your core features, and how will people use them?

Start with the features above and decide which ones your app can’t launch without. You can add more later based on feedback. Depending on what makes your app different, your must-have list might also include:

• Logging with device features: Users can add workouts through a form or with native device features like the camera or location. A running app might use location to map routes, while a strength app might let users snap a photo of a whiteboard workout.
• Support for different workout types: Tracking strength, cardio, and mobility sessions separately lets you show the right fields for each, such as weight for lifts and distance for runs.
• Friends and sharing: Letting users add friends or share a workout turns your clients into a referral channel.
• A weight-loss tracker: Regular weigh-ins plotted on a chart help users see progress that’s hard to notice day to day.
• Nutrition or diet tracking: A calendar and forms where users add meals, count calories, or plan menus are the core of any nutrition-focused app.
• Connections to wearables and fitness platforms: Services like Garmin’s Activity API have their own developer programs and access requirements, and Apple’s HealthKit is a native iOS framework with its own capability and permission rules. Check what access you’d need before you plan a launch feature around them.

Your must-have list comes in handy when you’re comparing tools, too. Make sure the platform you pick can handle everything on it, plus the features you’ll want to add later.

Where will your fitness app be available?

Think about where your clients will open the app. If they’ll check their program or log a workout at the gym, they’ll want it on their phone. If they’ll mostly watch content or manage their membership at home, a web app might be enough to start. For mobile, decide whether you need iOS, Android, or both.

Many fitness apps, like Strava and Peloton, run on both web and mobile. If you want the same, check what each tool can make. Not every tool builds cross-platform mobile apps, and many that do don’t build native ones.

Instead, many wrap a web app in a mobile container. Wrapped apps often can’t use every mobile feature, so they can feel clunky on a phone.

Choose how your fitness app will make money

Decide how you’ll charge before you build, because selling a monthly subscription works differently in an app than selling a single program or class.

Subscriptions and memberships

Subscriptions charge clients every month or year for ongoing access, like your workout library or premium features. If you sell them in a mobile app, Apple and Google usually want you to use their in-app purchase systems, though US court rulings now let apps point people to other ways to pay.

The stores take a cut of each sale, so build that into your price. Your app will also need to track each client’s subscription status and renewal date. On Bubble, in-app purchases (beta) handle subscriptions in native mobile apps.

Programs, coaching, and one-time purchases

Fixed-length programs and coaching packages need a different setup than recurring memberships. A user pays once for lifetime access to a 12-week plan or a block of coaching check-ins.

Your app needs a way to gate that content and track which users bought which package. In mobile apps, the stores’ in-app purchase rules usually apply to these digital purchases too, but Bubble’s native in-app purchases currently support subscriptions only, not one-time digital purchases. Confirm the current store rules and plan one-time program sales separately before making them a launch feature.

In-person classes and services

If your app books physical services, like personal training sessions or studio classes, the app store rules are different. Apple and Google generally don’t require in-app purchases for physical goods and services.

You can use a standard payment processor like Stripe, which usually means card-processing fees instead of app store commissions. Check the current App Store Review Guidelines and Google Play Developer Policy Center to confirm how the rules apply to your app.

How to create a fitness app with AI, step by step

On Bubble, the Agent builds a first version of your app, and you shape it from there by chatting with the Agent or editing it yourself.

If you’d rather follow along on video, the Bubble Basics for AI Builders series walks through building with AI on Bubble.

Step 1: Describe your app to the Bubble AI Agent

From your dashboard, choose Create with AI and describe your idea to the Agent. Include who the app is for, what clients will do in it, and the features from your must-have list. A short description is enough to begin. The Agent starts with a planning session and asks clarifying questions before it builds anything, or you can skip straight to generating if you already know what you want.

This walk-through builds a web app. If you’re starting with mobile, native mobile app generation (beta) lets the Agent build iOS and Android apps from a prompt too.

From there, the Agent drafts a blueprint of your app. The Features view lists what your app will do, and the Scenarios view describes how each type of user will use it.

This is the time to make adjustments. Click Add feature or Add scenario to cover anything missing from your must-have list. Getting the core functionality right first gives you a cleaner foundation to build more complexity on later.

When the blueprint looks right, click Generate app. You don’t need to get every detail perfect first, since you can keep adjusting the app afterward.

Step 2: Review the first version of your fitness app

When the Agent finishes, you land in a Preview tab inside the Bubble editor, with the Agent open beside it. The first version includes the design, data, and logic for the features in your blueprint.

Your app will look different from this example, since the Agent builds from your prompt and your answers during planning. Treat it as a starting point. The details may not match what you had in mind yet, and that’s normal with any AI tool.

The Agent explains what it built in plain language, and you can ask it to adjust specific parts or edit them yourself in the visual editor. Everything is visual, including the logic, data, and privacy rules, so you can see how each feature works and change any part of it.

Take a complete walk-through of your app, page by page, and note the following:

• Missing or unnecessary pages: Compare the pages against your must-have list. If the Agent added a page you don’t need yet, like a leaderboard, note it so you can remove or hide it.
• The right features and data on each page: Check that the dashboard shows the workout history and stats you want clients to see, and that each form asks for the right details.
• Missing features or functionality: Flag anything from your plan that didn’t make it in, like the ability to edit a logged workout, so you can add it in the next step.
• The look of the UI: Note colors, fonts, spacing, and layout you want to change. You’ll handle these in Step 4.
• Buttons, forms, and inputs that don’t work yet: Click everything. If a button does nothing, note what it should do, since that’s usually a missing workflow or missing data.

Step 3: Get the data and logic working

Now it’s time to work through your notes, starting with the data and logic.

Everything your app stores lives in its database. On Bubble, your database is organized into data types. There’s one type for each kind of information, like workouts or goals. Each data type has fields that hold the details, like a workout’s date or duration.

The Agent generates data types based on your blueprint. In our example, it created exercises, training sets, users, workouts, and workout exercises.

You’ll probably need to add more data as you refine the app. If you click into a dropdown and it shows no options, the dropdown itself was set up correctly but points to missing missing data.

To fix something like this, ask the Agent to add the missing data. You can also use the Agent to generate or refine your database schema from the data tab (see how to add data types with AI). Describe the feature you’re building, and the Agent suggests data types and fields that fit, which you can review and edit yourself.

Once the data type exists, open the app data tab to add entries for it. Each entry becomes an option in the dropdown menu. Click New entry, type the option in the Name field, and click Create.

Repeat this for each option you want to add, and you’ll see the entries appear in your database.

Back in the app, the dropdown now shows those options, pulled straight from your app’s database.

Logic is what makes your app do things, and on Bubble it’s built with workflows. Each workflow reads like a plain-language rule: When something happens, do this. For example:

• When the “Log workout” button is clicked, add a new workout to the database. This is what saves a client’s session so it shows up in their history.
• When the “Create goal” button is clicked, open the popup with the new goal form. The popup keeps users on the same page while they add a goal.
• When the user logs in, take them to their dashboard. Landing on their progress right away gives clients a reason to keep opening the app.

Test each workflow the Agent built in preview, and add any that are missing.

To add a delete button, drag a new icon element into the group that displays each workout.

Rename the icon by clicking its name at the top of the property editor, so it’s easy to find later. You can also use the property editor to choose a trash icon and adjust how it looks.

With the icon in place, add the logic that makes it work. Click Add workflow in the property editor.

That opens the workflow editor, where you tell the app what to do when the icon is clicked. Bubble has already filled in the first part, “When the icon is clicked,” so you only need to add what happens next. Click to add a step, then select Data (Things) > Delete a thing > Parent group’s workout.

In plain language, the workflow says: When this icon is clicked, delete the workout it belongs to from the database.

Open your workouts list in preview mode to test it. You can add new elements, data, and workflows anywhere in your app by following these same steps.

As you keep building, these resources can help:

• Read up on logic and workflows in the Bubble Manual. The guides explain each type of trigger and action with examples.
• Take the Bubble Basics for AI Builders course with Gregory John. It covers how to refine an app the Agent generated, one layer at a time.
• Browse the Bubble YouTube channel for video tutorials on specific features, from repeating groups to payments.
• Use Bubble plugins or the API Connector to add functionality like AI features or payments, or to connect your app to other software. If you’d rather build from an AI tool you already use, the Bubble MCP (beta) connects your Bubble app to tools like Claude or Codex, and the result stays visual and editable in Bubble.
• Ask the Agent in your editor when you have a question, or post in the Bubble Forum to get help from the community.

Step 4: Refine your app’s design

Once the features work the way you want, refine the user interface (UI). You edit the design directly in the visual editor, so the app looks the way you imagined it instead of like a default template.

For quick changes, click any element on the design tab and edit it in the property editor.

Next, add some images to make the homepage more inviting. Drag a group element from the sidebar onto your page, then drag three image elements into that group.

On the Appearance tab for each image, click to upload your photo.

To display the images in a row, open Layout and change the Parent container type to Row. From there, you can also set the alignment, such as centered or left-aligned, and adjust spacing.

For app-wide changes, use the styles tab. This is where you set default fonts, colors, and other parts of your design system. In our example, we switched the app to dark mode by setting default backgrounds to a dark color scheme and changing default fonts, button colors, and outlines to lighter colors.

A handful of style changes updates the look of the whole app, and you can see each change as you make it without writing code or rewording a prompt.

Step 5: Test, iterate, and launch

Test your app

Before clients see your app, test it thoroughly. There are several ways to test directly from the Bubble editor:

• Use preview mode: Click through your app the way a client would, including on a Simulated device for mobile. Try logging a workout, then check that it shows up on the dashboard. Camera workflows and push notifications need a dev build.
• Use the debugger: When something doesn’t behave the way you expect, run the debugger from web preview. It steps through each workflow one action at a time, so you can see exactly where it broke.
• Check the issue checker: The issue checker in the upper-right toolbar of the editor flags errors and inconsistencies across your app. Work through the list before you launch.
• Use a dev build for mobile apps: On a paid mobile plan, connect your app to App Store Connect or Google Play, and you can install a dev build on real phones through TestFlight or Google Play testing. It stays synced with the editor, so you can hand it to a few trusted clients at the gym and test push notifications along the way.

If testing turns up a problem you can’t pin down, ask the Agent. It can fix it or walk you through the fix.

Publish your app

Your app doesn’t need to be perfect to launch. Putting it in front of real clients gives you the feedback you need to refine it and decide what to build next. Hosting is included, and on paid plans the security dashboard helps you check your app’s setup before you go live.

When you’re ready, follow the steps for publishing a web app: Click Deploy, and Bubble pushes your app live. You can also publish mobile apps to the Apple App Store and Google Play Store from the Bubble editor. App store review takes more preparation, and Bubble helps you package and submit your app for approval. The stores also charge their own fees: The Google Play Store has a one-time $25 developer registration fee, and Apple requires an annual Apple Developer Program membership.

If you’re publishing to the app stores, set up any in-app purchases from your revenue model before you submit, and review the health data guidance in the next section.

What to know about health data and app store review

Fitness apps often hold personal details like weight or injury history, so Apple and Google look closely at how you handle them. Before you submit, make sure what your app asks for and what you tell users match what it does with their data.

Collect only the health data your app needs

Plan your database to collect only the information your app needs to deliver its features. A workout app might use a user’s age and weight, but if it doesn’t use medical history, don’t collect it. Collecting less lowers your risk.

Ask for sensitive health or device permissions, like the camera or location, when a feature needs them, not at signup. A clear reason in the moment, like “Allow location to map your run,” helps users understand why you’re asking.

What to disclose in your app’s privacy answers

When you submit your app, both stores ask what data you collect and how you use it. Your answers show up on your listing as Apple’s app privacy details and Google Play’s Data safety section. You’ll usually need a public privacy policy too, so check where each store wants it linked. And if you track users across other apps or websites, say so.

On Bubble, privacy rules are visual, so you can check exactly who can see each field in your database before you go live.

Where to check Apple’s and Google’s current rules

App store policies change often, especially around health data and subscriptions. Before you submit, review the latest App Store Review Guidelines and the Google Play Developer Policy Center. Pay close attention to the sections on health and medical apps, user privacy, and in-app purchases, and check that your app follows the current version.

Build your fitness app with Bubble

On Bubble, your app grows with your business. Everything is visual, from the design to the logic and data, so you can see how every part works and change it yourself whenever you need to.

Use AI when you want speed or edit by hand when you want precision. Your web and mobile apps run on the same backend, with hosting and security included, so you keep growing on the same app instead of rebuilding it later.

If you get stuck, the Bubble Manual walks through every part of the editor, and you can read up on how Bubble AI works. If you’d rather have someone else build it, a Bubble agency or a Bubble Developer can help.

You can try your idea today. Start building for free and plan your first version with the Agent.

Frequently asked questions

Can I build a fitness app without any coding experience?

On Bubble, you describe your app to the Bubble AI Agent, review its plan, and generate a first version you can see, understand, and edit visually, with no code required. There’s still a learning curve, but workflows read as plain-language steps, and you learn how apps store data and respond to clicks by working on your own app.

Can I build my own fitness app for free?

Getting started on Bubble is free: Generating an app with the Agent doesn’t use AI credits up to a monthly limit, and editing in the visual editor never does, so you can plan, build, and test before you pay. Going live takes a paid plan, starting at $32/month billed annually for Starter Web, $42/month for Starter Mobile, and $59/month for Starter Web & Mobile, and every plan includes a monthly AI credit allowance (see current plans and pricing).

How long does it take to build and launch a fitness app?

It depends on how many features you launch with and how much refining the first version needs, though on Bubble, early adopters have built and launched native mobile apps in one to two weeks. App store review adds time on top of the build, especially if your app collects health data or sells subscriptions.

Can my fitness app connect to Apple Health, Garmin, or other wearables?

On Bubble, you can connect web APIs such as Garmin’s through the API Connector or plugins from the Bubble Marketplace once you meet the provider’s access requirements. Apple’s HealthKit is a native iOS framework with its own app capability and permission requirements, so confirm current Bubble support, plugin availability, and Apple’s review rules before you plan a launch feature around HealthKit data.

Do fitness apps have to use Apple and Google in-app purchases?

Digital subscriptions and programs sold in a mobile app generally have to go through Apple’s and Google’s in-app purchase systems, while physical services like personal training sessions and studio classes can use a payment processor like Stripe. Check the current App Store Review Guidelines and Google Play Developer Policy Center to confirm how the rules apply to your app.