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See also: ChatGPT Plugins, ChatGPT Plugin Categories and App Development
App Development ChatGPT Plugins were a small but distinctive grouping inside the ChatGPT Plugins catalog operated by OpenAI between March 2023 and April 2024. Plugins in this group helped users design, scaffold, and ship full applications, most often mobile apps, web apps, or business backends, by describing the desired product in plain language and letting ChatGPT call an external builder service. The category sat next to Programming ChatGPT Plugins, Software Development ChatGPT Plugins, and Web Development ChatGPT Plugins, but focused on producing a finished, shippable application rather than helping a developer write code or browse the live web. The platform was deprecated on March 19, 2024 and shut down on April 9, 2024, with replacement workflows offered through Custom GPTs on the GPT Store.
The category captured an early experiment in connecting a frontier large language model to no code and low code app builders that could turn a paragraph of prompt engineering into a working iOS or Android binary, a hosted single page web app, or a custom enterprise resource planning (ERP) backend. It was not formally enshrined in the OpenAI plugin store interface, which sorted entries by Popular, New, and All. The grouping appeared in third party catalogs such as plugin.surf, GPTStore.ai, and AI Plugin Store.
OpenAI announced ChatGPT Plugins on March 23, 2023. The launch paired two first party plugins, a code execution sandbox and a web browsing tool, with eleven third party launch partners including Expedia, Instacart, Kayak, Klarna, OpenTable, Shopify, Slack, Speak, Wolfram, and Zapier. Access opened to all ChatGPT Plus subscribers on May 12, 2023, and the catalog grew to roughly one thousand plugins by late 2023.
A plugin was an HTTPS service that hosted a manifest at /.well-known/ai-plugin.json plus an OpenAPI specification describing its endpoints. Once a Plus user enabled a plugin in GPT-4 chat, the model received a short description of what the plugin could do and chose when to call its endpoints. App development plugins fit naturally into this model because their workflow was inherently conversational.
The first widely reported entry was DeployScript on May 28, 2023, followed by Appy Pie App Builder and Tailor ERP Generator on June 20, 2023, ABC Website Maker on June 26, 2023, Calculator Tools on July 14, 2023, For.io App Creator on July 24, 2023, and Back4App on August 7, 2023.
App development plugins were the only group whose primary output was a finished application binary, hosted page, or backend. The four developer leaning categories had different goals.
| Category | Primary output | Typical user |
|---|---|---|
| App Development | A finished mobile app, web app, or hosted backend | Founder or product owner with no coding background |
| Programming | Snippets, function bodies, computational results | Developer asking for help with a specific code task |
| Software Development | Repository analysis, ticket updates, deployment status | Engineer working on an existing codebase |
| Web Development | Live page fetches, scraped data, simple landing pages | Researcher or front end designer working with the web |
The practical boundary was the level of finished product the user expected. A programming plugin handed back code the user still had to integrate, run, or deploy. An app development plugin returned a deployed app, a downloadable binary, or a public URL ready to share with a tester or end user. Founders tended to activate one app builder for the entire chat, while engineers in adjacent categories often chained two or three plugins per conversation up to the OpenAI three plugin per chat ceiling.
The table below lists plugins verifiably classified under App Development on at least two independent third party directories or by their developers. All ceased operating inside ChatGPT on April 9, 2024.
| Plugin | Developer | First listed | What it produced |
|---|---|---|---|
| Appy Pie App Builder | Appy Pie | June 20, 2023 | Native Android and iOS mobile applications from a single text description |
| ABC Website Maker | Independent | June 26, 2023 | Hosted web apps from HTML, CSS, JavaScript, and JSON files |
| For.io App Creator | For.io | July 24, 2023 | Web applications generated and updated from a database schema |
| Calculator Tools | Calculator.tools | July 14, 2023 | Single page web apps, calculators, trackers, and games in a hosted iframe |
| Back4App | Back4App | August 7, 2023 | App backends, data models, REST and GraphQL APIs, and cloud functions |
| DeployScript | Independent | May 28, 2023 | HTML, CSS, and JavaScript web apps managed and deployed from chat |
| Tailor ERP Generator | Tailor K.K. | June 20, 2023 | Headless ERP applications based on CRM, HRIS, and SCM templates |
Additional plugins, including independent calculators, hobbyist ERP wrappers, and small website generators, briefly appeared with App Development tags in mid 2023 but did not generate enough public coverage to allow confident historical reconstruction. They are omitted here. OpenAI never published an archived catalog after the shutdown.
Appy Pie App Builder was the most visible plugin in the category. Announced on June 1, 2023 by Appy Pie, an established no code app development platform, it was approved on June 20, 2023 as a free integration for ChatGPT Plus users. The manifest declared a single GET endpoint at /v1 accepting a text query parameter with a brief description. The response carried an app name, title, description, image URL, and link URL for the generated mobile app, which the user could refine in the Appy Pie web editor. After the platform shutdown, Appy Pie launched a Custom GPT on the GPT Store and continued its AI App Generator on its own website.
For.io App Creator was distinct because its input was a database schema rather than a free form description. The user defined tables, columns, foreign key relationships, and desired application features, and the plugin generated a web application around that schema. A single command, createOrUpdateApplication, drove the workflow. For.io presented the plugin as a path for product managers and analysts who could describe a data model in plain language but did not want to write a backend.
Calculator Tools shipped on July 14, 2023 with the broad pitch of letting users instantly create any app, calculator, website, tool, or game using AI and no code. The plugin generated HTML for a single page application and deployed it inside a secure iframe at a unique URL. Typical outputs included tip calculators, mortgage estimators, mood trackers, browser games, and free response quizzes. ABC Website Maker, first listed on June 26, 2023, used a similar model, producing hosted web applications by managing HTML, CSS, JavaScript, and JSON files inside the chat. After the shutdown, the Calculator Tools team published the Automatic Programming GPT on the GPT Store as a successor.
Back4App brought a backend as a service to the conversation. Released on August 7, 2023, the plugin let users build data models, REST and GraphQL APIs, cloud functions, and authentication rules through plain language. Back4App treated the ChatGPT integration as a thin layer on its existing low code Parse based platform, so any backend created through the plugin was available through the Back4App dashboard.
DeployScript was added on May 28, 2023, making it one of the earliest App Development plugins. It generated and deployed HTML, CSS, and JavaScript web apps from chat, exposing endpoints to create a new app, update existing files, and retrieve hosted output. It was filed under AI Assisted Development on whatplugin.ai and under App Development on plugin.surf.
Tailor ERP Generator, published by Tokyo based Tailor K.K. on June 20, 2023, let users create custom ERP applications by selecting a template (CRM, HRIS, or a simplified SCM) and refining it through chat. Once a template was complete, the plugin downloaded application files for deployment on the Tailor platform. Tailor positioned it for non technical staff inside small and mid sized businesses.
The boundary between App Development plugins and the adjacent developer categories was porous. Plugin authors could declare any tags, and third party directories chose how to file each entry, so the same plugin appeared under different categories.
| Plugin | App Development | Programming | Software Development | Web Development |
|---|---|---|---|---|
| Appy Pie App Builder | Yes | No | No | Sometimes |
| For.io App Creator | Yes | No | Sometimes | Sometimes |
| Back4App | Yes | No | Yes | No |
| DeployScript | Yes | Yes | No | Sometimes |
| Calculator Tools | Yes | No | No | Sometimes |
| Tailor ERP Generator | Yes | No | Sometimes | No |
A useful test was to ask what the user did with the output. If they shipped it, the plugin belonged in App Development. If they edited or merged it into an existing project, it belonged in Programming or Software Development. If they fetched live information, it was Web Development.
The App Development plugins disappeared on the same dates as the rest of the platform. OpenAI's stated reasons applied with extra force.
The workflows were absorbed into a broader ecosystem of AI app builders, Custom GPTs on the GPT Store, agentic developer tools, and standalone no code platforms.
The direct migration path was a Custom GPT with Actions. Appy Pie, Calculator Tools, Back4App, and Tailor each launched a Custom GPT in early 2024 that reused most of the original plugin backend. Revenue sharing gave creators a financial incentive the plugin program never offered.
The broader market for AI app generators expanded after 2024. Newer entrants such as Bolt, Lovable, Base44, and v0 adopted the same conversational model but generated full source code that users could download, modify, and self host. For users wanting more control over code, agentic developer tools became the default replacement, including GitHub Copilot and AI first editors combining chat, repository awareness, and shell access.
In October 2025 OpenAI introduced the ChatGPT Apps SDK, which let third party developers ship apps that ran inside the ChatGPT conversation with richer interactive components than plugins had supported. Replit, Canva, Figma, and Zillow shipped early apps that overlapped with the original App Development plugin space.
The table below maps common 2023 era App Development plugin workflows to the modern equivalent.
| Original task | Plugin pattern | Modern replacement |
|---|---|---|
| Native mobile app from a description | Appy Pie App Builder | Appy Pie AI App Generator or a Custom GPT |
| Web app from a database schema | For.io App Creator | Bolt, Lovable, or a Custom GPT with Actions |
| Single page calculator or game | Calculator Tools | ChatGPT Canvas, v0, or the Calculator Tools Custom GPT |
| App backend with REST and GraphQL APIs | Back4App | Back4App AI Agent or a Custom GPT |
| Small ERP from a template | Tailor ERP Generator | Tailor's web product or a Custom GPT |
| Quick HTML CSS JavaScript page | DeployScript or ABC Website Maker | ChatGPT Canvas, v0, or a Custom GPT |
The underlying capability survived the shutdown. What changed was the surface: instead of a per chat plugin toggle, the same workflow now lives inside a Custom GPT on the GPT Store, a standalone AI app builder website, or an editor connected to a Model Context Protocol server.
App Development plugins were a brief experiment but previewed patterns that became standard. Conversational app creation, schema driven web app generation, hosted single page outputs from a chat, and natural language ERP design all started here. The category also exposed the limits of the plugin model: small audiences, weak discovery, vendor lock in, and limited control over generated code. Each pain point shaped the design of Custom GPTs, the GPT Store, and the later ChatGPT Apps SDK.