New AI Coding Tool Goes Viral: Create an App in 2 Minutes on Your Phone

I read the release notes and watched the demo, but my first thought wasn’t about the magic of creation—it was about the operational nightmare of maintenance. Replit Agent promises to automate the entire stack from prompt to production, but as a platform engineer, I’m looking at latency, cost, and who is on-call when that auto-generated code breaks in prod.

Following Cursor, another new darling has emerged in the programming world: Replit Agent, an AI agent launched by the AI startup Replit.

The pitch is that development environments, coding, package installation, database configuration, deployment, and more—all automated! The operation requires just a single prompt:

△ CEO introduces Replit Agent

Video link: https://mp.weixin.qq.com/s/G0BYEUe4lDNRnywyrWNTUA

It is clear that Replit Agent does not focus solely on coding but also addresses various critical aspects of the development process. As a result, developing an app can now be measured in minutes:

• 2 minutes to create an app on your phone
• 2 minutes and 43 seconds to create a Wordle-like game
• 4 minutes to build a website for submitting bug reports
• 5 minutes to create an LLM application and deploy it online

Moreover, these cases were all verified by users who tested them personally. Reflecting the “crazy” effect that netizens described after watching, the introduction video posted by CEO Amjad Masad has already garnered over 8,000 likes.

Even Elon Musk weighed in, though he came to ask a question:

(For now,) it cannot write a good video game.

However, Amjad Masad also stated in the introduction video that Replit Agent is still in its early access phase and has room for improvement. So how does Replit Agent automatically build apps at a minute-level pace? Let’s continue to look.

Building an App on Your Phone in 2 Minutes

The headline feature of Replit Agent is its mobile-first deployment, allowing developers to spin up applications directly from a smartphone. This shifts the paradigm from keyboard-heavy IDEs to voice-and-tap workflows, which matters for rapid prototyping but introduces new latency and context-switching costs for platform engineers. I read that this capability lowers the barrier to entry for non-technical users, though it raises questions about code quality and maintainability in a production environment.

To get started, we simply download the Replit app on our mobile devices. The entry point is clearly marked at the top of the “Create” interface as Start with AI:

Netizen Mckay Wrigley tested this workflow live. He clicked “Start with AI” and pasted a prompt to create a coupon generator into the input box:

Replit Agent then automatically wrote code, configured settings, and deployed the app at what was described as a “blazing-fast speed,” prompting Wrigley to exclaim “So Amazing”:

Video link: https://mp.weixin.qq.com/s/G0BYEUe4lDNRnywyrWNTUA

If the initial output contains errors, users can use natural language to instruct Replit Agent on what went wrong. The AI processes this feedback iteratively until the issue is resolved, reducing the need for manual debugging sessions.

In practice, iterative auto-fixing saves time but hides technical debt behind a conversational UI. I think mobile deployment introduces network latency that desktop IDEs don’t typically face.

Following the experience, Mckay Wrigley provided this evaluation:

AGI in internal tools.

The entire process took less than 5 minutes.

Another user, Haider, demonstrated building a complete app via phone in under 2 minutes:

Video link: https://mp.weixin.qq.com/s/G0BYEUe4lDNRnywyrWNTUA

Some users claimed they built apps using Replit Agent while riding the bus, highlighting the tool’s accessibility in low-bandwidth or distracted environments.

Replit Agent is also fully functional on desktop computers. For instance, one user created a Wordle-like word puzzle game in just 2 minutes and 43 seconds:

Video link: https://mp.weixin.qq.com/s/G0BYEUe4lDNRnywyrWNTUA

In a more extreme example, a user with zero coding experience built a 3D platform game using Replit Agent.

Video link: https://mp.weixin.qq.com/s/G0BYEUe4lDNRnywyrWNTUA

The core implication is that app development is becoming as simple as having an idea. One user realized a dream held for 15 years—developing their own application—in less than 15 minutes using Replit Agent.

Shipping a Startup in 67 Minutes vs. Keeping It Running

The AI coding track has been relentless this year, moving from viral demos like Devin and Genie (powered by GPT-4o) to the current top-tier standard of Cursor. Now, Replit Agent is shifting the goalposts again: it doesn’t just write code; it packages the entire development workflow.

I followed the recent experiment where Greg Isenberg and Riley Brown built a startup in 67 minutes using v0, Cursor, Claude, and Replit. The most striking detail isn’t the speed—it’s that Riley Brown has no engineering background. This suggests a massive shift in who can ship software, but it also raises questions about maintainability for non-engineers.

Operationally, non-engineer founders shipping code means your on-call rotation will likely include people who don’t know how to read logs. In practice, rapid prototyping with AI is great until you need to debug a race condition at 3 AM without a senior dev nearby.

Their process relied on three key capabilities:

1. Translating natural language into complex application architectures.
2. Using AI tools to generate UI code and interpret error messages like an experienced Stack Overflow expert.
3. Quickly integrating AI features to handle real-time startup challenges in marketing, finance, and management.

Greg Isenberg’s take is blunt:

We are living in an era where “not knowing technology” is no longer an excuse. If you can speak, you are an engineer.

Below is the full process of them building a startup using AI tools via live stream:

Video link: https://mp.weixin.qq.com/s/G0BYEUe4lDNRnywyrWNTUA

The video is quite long. For easier viewing, we have compiled a rough framework of the video content:

Finally, here is the link to Replit Agent. Those with ideas for developing apps can go try it out.

Replit Agent Link:
https://docs.replit.com/replitai/agent