Hey Dev.to community!

Over the last 3 weeks, I’ve been working on a massive product sprint: building a completely local-first web directory called CalcHive.

I wanted to see how far I could push browser-based client-side computational utilities without cluttering a server, bloating response payloads, or logging unnecessary user data.

Today, the project is officially live on the Product Hunt homepage with 288 calculators fully up and running!

⚡ The Stack & Why Local-First?

• Hosting: Vercel (Edge network processing times have been beautiful for keeping initial DOM paints under 0.4s)
• Processing: 100% Client-Side. Whether a user is parsing a freelance hourly margin or doing compound interest calculations, the data never leaves their browser.

📈 The Inventory Scale

Managing 288 custom tool components without turning the app into a chaotic maintenance nightmare required strict file-structure automation. I actually setup a codex script to dynamically auto-update our sitemap.xml index manifest file every single time a new layout template gets compiled (Google Search Console successfully crawled all 288+ of them today!).

The categories stretch across:

• Freelance & Business Math (Upwork fee models, hourly conversion matrix tables)
• E-Commerce & Digital Marketing (Dropshipping margins, conversion multipliers)
• Finance & Investment Tools

🛠️ Need Your Developer Brains

Since this platform relies completely on client-side state manipulation and math execution, I would love for some fellow developers to absolutely stress-test it.

How is the UI scaling on your mobile devices? Are there any browser rendering lag spikes when running heavy computations?

Check out our live launch hub here and let me know your brutal feedback in the comments: [https://www.producthunt.com/products/calchive]

Thanks for reading, and let's squash some bugs live today!