Brainbaby vs Bubble: Mobile App Builder Compared

If you want an iPhone and Android app, Brainbaby and Bubble offer two different ways to get started. Brainbaby is our first choice for a prompt-led mobile project when having React Native and Expo source to continue with matters. Bubble is a strong choice when you want to manage screens, data and workflows in a visual platform with a shared web and mobile backend.

This comparison is published by Brainbaby. It is based on public product information, not a controlled side-by-side performance test. The sample app below is a planning exercise, not a claim that either product built or shipped it. Features and prices can change; check the current plan and your own project's requirements before purchasing.

Brainbaby vs Bubble at a glance

Question	Brainbaby mobile app builder	Bubble mobile app builder
Starting point	Describe the app and refine the generated project with follow-up prompts.	Use AI to generate a starting point, then edit visually or ask its AI agent for changes.
Mobile output	A React Native and Expo project intended for iOS and Android; preview, review and test it.	Native mobile apps built using React Native, managed through Bubble's visual platform. Its mobile builder is marked beta.
App logic and data	Review the generated implementation and configure and test any backend your app requires.	Bubble provides a visual database, workflows and privacy rules; web and mobile projects can share a backend.
Source portability	Brainbaby's mobile product page says you can export the project source. Check the actual export and dependencies for your project.	Bubble's founder says Bubble apps run on its shared runtime and are not currently handed off as exportable source code.
Store release	A prototype is not a store submission: prepare signed builds, developer accounts, listings and review.	Bubble describes packaging and submitting from its editor. Developer accounts and store review still apply.
Cost model	Builder access and usage depend on the plan and account. Check the current in-product allowance.	A paid Mobile or Web & Mobile plan is required for store publishing; workload and AI allowances also matter.

Sources: Brainbaby's mobile builder, Bubble's mobile builder, Bubble's source-code explanation and Bubble's pricing FAQ.

Which should you choose?

Start with Brainbaby if you want to explain a mobile app in everyday language and work toward a project that a React Native developer can inspect after export. The broader workspace is useful if the same project also needs chat, design assets, documents or a presentation. Those are separate tools with their own plan and usage limits; they do not automatically make an app production-ready.

Choose Bubble if visual control of your data and workflows is the main priority, especially when an existing Bubble web app and a new mobile app need to share the same backend. Bubble describes built-in user authentication, privacy rules and a visual editor. That is a meaningful advantage for a team that wants to stay inside its managed platform rather than own a separate app codebase.

Neither choice removes the need to validate permissions, real device behavior, security, payment flows and store requirements. A good-looking preview is one piece of evidence, not a completed release.

Native app or mobile website?

This comparison is about mobile projects, not just a responsive website. Brainbaby's product page describes an Expo and React Native project for iOS and Android. Bubble says its mobile apps also use React Native and can access device features, including the camera and notifications.

That does not mean every generated screen already has every device feature wired up. If your app needs push notifications, camera access or in-app purchases, put those requirements in the brief and verify the actual implementation. On a test device, check permission denial, an interrupted network request and what happens after closing and reopening the app. Store signing and review are separate steps on both paths.

A realistic brief to compare the two

Imagine a local yoga studio wants an app where a customer can browse classes, request a spot and see their upcoming bookings. This is a fictional evaluation brief; it is not an app we claim to have built or tested here.

Use the same short brief in either product:

Build an iOS and Android class-booking prototype. Show a class list and detail screen, let a signed-in customer request a spot, and show that customer's bookings. Include empty and loading states. Do not claim payments or notifications work until they are configured and tested. Explain what is stored and where.

Then ask the same questions of both outputs:

Can a user navigate from the list to a class and back without losing state?
Is the booking saved after the app restarts, or is it only sample data?
Can one customer see another customer's booking? Identify and test access rules with two separate test accounts.
What happens if a class is full or the network drops during a request?
Which steps are still needed to create a signed build and submit it for review?

In Brainbaby, inspect the generated project and its configuration, then decide how your authentication, database and hosting will work. In Bubble, inspect the generated screens and the actual visual workflows, data types and privacy rules. Do not assume that a generated rule is correct simply because it exists.

Source code and long-term ownership

If your team expects to move between developers or maintain the app outside its original builder, portability is worth testing early. Brainbaby says the mobile project source can be exported. Download it, read the dependencies and licenses, and try the setup with the person who will maintain it. Exporting source does not automatically transfer any third-party service accounts, data, credentials or deployment configuration.

Bubble takes a different approach. Its team explains that Bubble applications are described in platform-specific files executed by its shared runtime rather than exported as a conventional editable app codebase. That lets Bubble offer a visual development environment and managed infrastructure, but changing platforms later may require rebuilding application logic. Ask each vendor for the actual data-export and migration process before your app holds important customer data.

Pricing and the costs after the first prototype

Brainbaby's pricing page lists mobile and website builder access on paid plans. The amount you can build depends on your plan and account allowance; check the builder and final checkout for current terms. Hosting, databases, external APIs, maintenance and Apple or Google developer fees may add to the budget.

At the time of this review, Bubble's FAQ lists Mobile Starter at $49 per month billed monthly, or $42 per month when billed annually. Web & Mobile Starter is listed at $69 per month billed monthly, or $59 per month billed annually. Bubble allows building and testing on its free plan but says a paid Mobile or Web & Mobile plan is needed to publish to the stores. Bubble prices and billing terms may change.

Bubble also measures app activity in workload units. Its workload documentation explains that extra workload can be purchased, including pay-as-you-go overages. On either platform, compare a complete monthly budget rather than treating the subscription price as the entire cost. Our mobile app cost calculator can help list the components before you spend.

What to check before inviting real users

Account and data security: verify authentication and authorization using at least two test accounts. Keep API secrets out of exported client code.
Persistence and recovery: restart the app, lose the network and retry a request. Confirm that the actual database—not a placeholder—contains the expected changes.
Devices and accessibility: test small and large screens, keyboard movement, text scaling and permission prompts on real iOS and Android devices.
Payments and notifications: use each provider's test environment and confirm events, failures, refunds and consent before enabling real transactions or messages.
Release preparation: budget for developer accounts, signed builds, privacy information, screenshots and independent App Store and Google Play reviews.

Frequently asked questions

Is Bubble only for web apps?

No. Bubble offers a native mobile builder for iOS and Android, marked beta on its product page. Web and mobile apps in the same Bubble project can share a backend, subject to the relevant plan. It would be inaccurate to compare Bubble as though it only produces mobile websites.

Can I export a Brainbaby app and hire a developer?

Brainbaby's mobile builder describes exporting the React Native and Expo project. Confirm that the exported files, dependencies and any required backend configuration meet your developer's needs. The handoff still requires setup and testing.

Is a free prototype the same as a free published app?

No. Free access, builder usage, source export, hosting and app-store publishing are different stages. Bubble identifies a paid plan for store publishing; Brainbaby users should check their current builder allowance and separately budget for store accounts and infrastructure.

Which is better for a first mobile app?

Choose the workflow you can maintain. We recommend Brainbaby when prompt-led building and access to an exportable React Native project are most important. Bubble may be the better fit when you value its visual data and workflow editor and prefer to run the app on its managed platform. Test a narrow brief and compare the results against the checklist above.

Ready to plan your first screen? Explore Brainbaby's mobile app builder or sign in to the builder. Review the applicable plan and usage allowance before running a generation.