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AI App Builder Free
Can you build an app with AI for free?
Section titled “Can you build an app with AI for free?”Yes, up to a point. A free AI app builder plan will take you to a working prototype of a small app. It will not usually take you to a finished product on your own domain, because free plans meter how much you can ask the AI and keep the launch features for paying customers.
The reason is simple. Every request you send is processed by a large AI model, and that costs the vendor money each time. A free plan is a sample sized to show you the product, and the pricing page tells you exactly how big the sample is if you know how to read it.
What a free plan gets you
Section titled “What a free plan gets you”On the hosted builders we read in November 2026, a free plan typically includes:
- An account without a card. Bolt’s free tier, for example, is described as “free forever, no card required” (Bolt pricing).
- A small recurring allowance of AI requests, in whatever unit the vendor uses.
- A live preview of the app as it is built.
- Hosting on the vendor’s address, usually with the vendor’s badge.
- A basic backend. Base44’s free tier lists “authentication, database functionality, analytics” (Base44 pricing).
That is a real offer. For checking whether an idea works as software, it is often all you need.
The kinds of limit
Section titled “The kinds of limit”Free plans differ in detail and agree in structure. Every limit you will meet is one of these seven kinds. The examples are from each vendor’s own page; the amounts change often, so follow the links for current figures.
| Kind of limit | How it shows up | An example to verify |
|---|---|---|
| Usage meter | A count of credits, messages or tokens | v0 caps free use by messages per day; Bolt counts tokens |
| Refill rhythm | Daily grants, a monthly ceiling, no rollover | Lovable grants free build credits daily, up to a monthly maximum |
| Launch walls | No custom domain; vendor badge on the app | Lovable and Bolt list custom domains and badge removal under paid plans |
| Project walls | A cap on apps, or on published apps | Replit Starter includes one free published app; Base44 caps the number of free apps |
| Shelf life | Published links or idle backends that switch off | Replit’s free published link goes down automatically after a set period |
| Code access | Download or repository sync held back | Lovable includes Git sync on Free but lists code download as paid |
| Capacity | Database size, web requests, upload size | Bolt lists a web request ceiling and a file upload limit on Free |
Free-tier limits explained goes through each meter and wall, and shows how to read a pricing page in five minutes.
Four routes to a free build
Section titled “Four routes to a free build”There is more than one way to pay nothing, and they suit different people.
| Route | Software | AI model | Hosting | Skill needed |
|---|---|---|---|---|
| 1. A hosted builder’s free plan | Free | Included, metered | Included, on a subdomain | None |
| 2. An open-source builder with a pay-per-use key | Free | You pay the provider | Yours to arrange | Installing an app, creating an API key |
| 3. An open-source builder with a local model | Free | Free, on your hardware | Yours to arrange | A capable computer and patience |
| 4. A coding agent on a subscription you already pay for | Varies | No new bill | Yours to arrange | Comfort with a code repository |
Route 1 is right for most people starting out. Nothing to install, and the meter is the only thing to manage. Use What you can build for free to size the project, and Making free credits last to stretch the allowance.
Routes 2 and 3 swap the vendor’s meter for your own. Tools such as bolt.diy and Dyad are free to run and let you choose the model. With a paid API key you pay only for what you use. With a local model you pay nothing per request and accept whatever quality your machine can run. Open-source AI app builders lists the projects and their licences.
Route 4 is not free in the strict sense, but it adds nothing to your bills. If you already have a subscription that includes a coding agent, that agent can build an app in a repository on your machine.
One route to avoid: opening several accounts on the same service to multiply a free allowance. A vendor’s terms may prohibit it, and it leaves your project scattered across accounts that can be closed.
When to pay
Section titled “When to pay”Paying is the sensible choice when one of these becomes true:
- You hit the allowance on most days. If waiting for the refill is now the slowest part of the project, your time has become the larger cost.
- Real people will use the app. A badge, a vendor subdomain and a link that may expire are fine for a demo and wrong for customers.
- You need your own domain. On Lovable, Bolt and Base44, that alone requires a paid plan.
- You want the code outside the platform and your free plan holds back the download.
- The app stores data that matters. Free backends can be paused or capped. Supabase, a hosted database that some builders and open-source tools connect to, pauses free projects after a period of inactivity.
A common pattern is to prototype on free, pay for a month or two while you build in earnest, then reassess. Before you rely on that, check the vendor’s page for what happens to a custom domain and unused credits if you downgrade.
Frequently asked questions
Is there a completely free AI app builder?
Several hosted AI app builders have a free plan with no end date, and several open-source builders cost nothing to install. Neither is unlimited. Hosted free plans meter how much you can ask the AI each day or month, and open-source tools still need an AI model, which is billed by its provider unless you run one on your own computer.
What is the catch with free AI app builder plans?
The catch is the meter and the walls. The meter is a small allowance of credits, messages or tokens that refills daily or monthly. The walls are features kept for paid plans, most often a custom domain, removal of the vendor's badge, more than one published app, and sometimes downloading the code.
Can I publish an app I built on a free plan?
Usually yes, on the vendor's own subdomain and with the vendor's badge on it. Connecting your own domain was a paid feature on Lovable, Bolt and Base44 when we checked in November 2026. Some free plans also limit how many apps you can publish or how long a published link stays up, so read the plan table.
Do free AI credits roll over to the next month?
Generally not. On the plans we read, free allowances that refill daily expire at the end of the day, and free monthly allowances reset without carrying over. Rollover, where it exists, is a paid-plan feature. That makes short, regular sessions more efficient than saving up for one long one.
Are open-source AI app builders really free?
The software is. Projects such as bolt.diy and Dyad can be downloaded and run at no charge. The AI model they call is the remaining cost. You either pay a model provider per use through an API key, use a subscription you already have where the tool supports it, or run a local model on your own hardware.
Is Emdash a free AI app builder?
No. Emdash is our product, and it is not an app builder. It is a tool for running AI coding agents on a code repository. Emdash Classic is free and open source, but the coding agents it runs need their own subscription or API key, and it does not generate or host an app from a prompt.