I Built a Subscription Box Calculator Using Vibe Coding

calculator — Wed, 20 May 2026 17:58:09 +0000

I recently built a small web tool called Subscription Box Calculator using a vibe coding approach.

The idea was simple: create a useful calculator that helps subscription box founders estimate their pricing, costs, profit, and recurring revenue before launching or scaling their business.

What the tool does

Subscription box businesses look simple from the outside, but the numbers can get confusing quickly.

You need to think about:

product cost
packaging cost
shipping cost
subscription price
number of subscribers
churn rate
monthly revenue
profit margin

Even a small mistake in pricing can reduce profit or make the business unsustainable.

So I wanted to build a simple calculator where users can enter their numbers and instantly understand whether their subscription box idea makes financial sense.

Why I used vibe coding

This site was built using vibe coding, where AI helps turn an idea into a working product faster.

Instead of starting with everything perfectly planned, I focused on the result I wanted:

A simple, clean, useful calculator for subscription box businesses.

Then I used AI to help with structure, UI ideas, calculation logic, copywriting, debugging, and improvement.

AI made the process faster, but I still had to guide the product, test the logic, review the output, and decide what actually made sense.

What I learned

Vibe coding is powerful when you already know what problem you want to solve.

AI can help generate code, but it cannot replace product thinking.

The most important part is still understanding the user problem and checking whether the final result is useful.

For this project, AI helped me move from idea to working website much faster than building everything manually.

Final thoughts

The Subscription Box Calculator is a small example of how AI can help developers and makers build practical tools quickly.

Vibe coding is not about skipping the work.

It is about working with AI as a coding partner and using it to build, test, and improve ideas faster.

DEV Community: calculator

I Built a Subscription Box Calculator Using Vibe Coding