We are rapidly approaching a reality where if the software you need doesn’t exist, you can simply will it into existence over a morning coffee. The era of rigid, one-size-fits-all tools is fading, replaced by bespoke applications built on the fly. I just saw this incredible post from an AI professional who demonstrated exactly what this future looks like by building a custom spreadsheet app from scratch in just two hours.
The Rise of “Vibe Coding”
This concept, which the creator refers to as “vibe coding”, represents a significant shift in how we approach problem-solving with technology. Instead of writing complex code based on strict engineering requirements, this innovator used Google AI Studio to build a tool based purely on intuition and immediate need. The goal was to combine the logic of Excel with the generative power of advanced AI models like Gemini 3 Pro and a smaller, efficient model humorously dubbed “Nano Banana.”
The result is a functioning web-based prototype that functions neither like standard Excel nor Google Sheets. It is a completely tailored environment designed to handle specific, creative workflows that traditional spreadsheets struggle with. By leveraging these AI models, the post’s author created a grid interface that understands context, generates content, and manipulates media directly within the cells. This proves that the barrier to entry for creating powerful, custom software is practically vanishing for those willing to experiment.
⚙️ Custom Functions That Actually Work
The most impressive aspect of this project is the implementation of a tailored suite of AI functions. Standard spreadsheets rely on mathematical formulas, but this expert built a library of semantic functions that allow users to interact with text and images naturally.
For example, the creator implemented an =AI("prompt", cell_or_range) function. This is an all-purpose tool that allows the user to treat any cell as a prompt input or context source. Instead of copying data out of a spreadsheet, pasting it into a chatbot, and pasting the result back, the logic happens right where the data lives. The author also included specific utility functions like =PROOFREAD(cell) and =SHORTEN("word_count", cell). These might seem simple, but when integrated into a spreadsheet, they allow for bulk processing of data, like cleaning up hundreds of product descriptions or shortening ad copy, in seconds rather than hours.
🎨 Multimodal Magic in a Grid
One of the biggest limitations of traditional spreadsheets is how poorly they handle visual data. They are designed for numbers and text, often leaving images floating awkwardly over the grid. The innovator behind this tool completely flipped that script by integrating image generation and editing directly into the formula bar.
The tool features an =IMAGINE(cell_with_prompt) function, allowing the spreadsheet to generate visuals based on text descriptions in neighboring cells. Even more fascinating is the =CHANGE("prompt", image_cell) function, which utilizes the “Nano Banana” model to edit existing images. In the demo, the creator uploaded a half-completed storyboard template. They were able to write prompts to fill the narrative gaps and then automatically generate and refine the accompanying images within the same view. This turns the spreadsheet from a calculator into a dynamic creative studio.
🚀 Solving Specific Problems, Not Generic Ones
The philosophy driving this project is arguably more important than the code itself. The LinkedIn user emphasized that this wasn’t about copying what is already on the market. It was about tackling very specific challenges that general software ignores.
By spending just two hours in Google AI Studio, the author built a prototype that worked smoother than they imagined. This highlights a massive efficiency gain: building a tool perfectly suited to your workflow is now often faster than trying to force-fit a generic tool to your needs. The creator noted that while this isn’t a replacement for fully built enterprise software, it is reshaping our reality. It allows for a level of customization where the software adapts to the user, rather than the user adapting to the software.
📌 Practical Elements: The Function List
- =AI(“prompt”, cell_or_range): The Swiss Army knife for general text generation and analysis.
- =TRANSLATE(“lang”, cell): Instantly converts text in a selected cell to the target language.
- =PROOFREAD(cell): automatically fixes grammar and spelling errors without leaving the grid.
- =SHORTEN(“word_count”, cell): Condenses text to a specific length, perfect for formatting constraints.
- =IMAGINE(cell_with_prompt): Generates new images directly inside the cell based on text inputs.
- =CHANGE(“prompt”, image_cell): Edits an image within a cell based on new instructions.
Potential Challenges and Nuances
While this is an exciting development, it is important to remember that this is a prototype. As the creator honestly noted, it is not a replacement for fully robust software like Excel just yet. A “vibe-coded” app built in two hours likely lacks the security features, massive data scalability, and collaboration reliability of enterprise tools. Additionally, relying on API calls for every cell calculation could become costly or slow if the spreadsheet grows too large. However, for individual workflows, rapid prototyping, and creative tasks, the utility is undeniable.
This project is a glimpse into 2026, where we build our own tools as easily as we write emails. I highly recommend looking at the full post to see the video demo of this in action!