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AI · March 26, 2023

I made a non-trivial iOS app with GPT-4 in just a few hours

After being inspired by your responses to the Ask HN thread yesterday (https://news.ycombinator.com/item?id=35299071), I decided to see if I could use ChatGPT to make a functioning app. I picked a random project idea out of my Notebook of Amazing Ideas, and spent just a couple of hours using GPT-4 to build it. I've never built an iOS app before, and even if I made something like this as a web app (my usual job), I would expect it to take at least a week. My process was basically 1) Ask ChatGPT to write some code 2) Copy and paste the code into the right files (this took a…

I made a non-trivial iOS app with GPT-4 in just a few hours launched on March 26, 2023 with 10 votes, #1,903 of 5,007 launches that month and more than 75% of that year's launches. The site was still online in September 2026, 3 years on.

In plain words

This is a demonstration of using GPT-4 to rapidly develop an iOS application. A developer with no prior iOS experience built a functioning app in a few hours by having the AI generate code, then iteratively fixing errors through back-and-forth prompting. The process involved copying generated code into appropriate files, running the application, and feeding error messages back to GPT-4 for solutions. The project illustrates how AI coding assistance can significantly compress development timelines for developers experienced in other frameworks like web development.

written from the facts on this page · September 2026

From the sources

Contribute to localjo/CalendarMapApp development by creating an account on GitHub.

In the maker’s words, at launch

After being inspired by your responses to the Ask HN thread yesterday (https://news.ycombinator.com/item?id=35299071), I decided to see if I could use ChatGPT to make a functioning app. I picked a random project idea out of my Notebook of Amazing Ideas, and spent just a couple of hours using GPT-4 to…

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