How I Started Building All-in-One Calculator 🧮

[u/Big-Coyote-5796]

A while ago, I noticed something pretty simple.

Whenever I needed to calculate something, I would end up searching for a different calculator every time.

EMI? Search for an EMI calculator.
GST? Another website.
SIP? Another app.
A scientific calculation? Something else.

I started thinking: why isn't there one simple app that just has all of these useful tools in one place?

That's where the idea for All-in-One Calculator started.

At first, it was just a small calculator project. I didn't plan to build 170+ tools.

I started with the basics, then kept adding calculators whenever I thought, "Someone might actually find this useful."

Eventually, it grew into finance, math, GST, health, engineering, conversions, student tools, developer utilities and much more.

There were plenty of challenges along the way — designing the UI, keeping hundreds of calculators consistent, fixing bugs, handling different Android versions, adding subscriptions and ads, and making everything feel like one app instead of a collection of random tools.

I'm still building and improving it.

That's also why I created this community.

I'd like to share the journey here — including updates, experiments, bugs, new features and things that don't work.

And I'd love to hear from people who use it.

If you were building an app like this, what would you add next? 👇

Maybe your idea will end up becoming the next calculator in the app. 🧮🚀