About

Tools built while shipping real apps.

Mr.AndroidShin Dev Tools is a small collection of single-purpose utilities for Android and Jetpack Compose developers. It is run by one person — a solo Android developer who designs, builds and publishes apps to Google Play, mostly in Kotlin and Jetpack Compose.

Why the site exists

Every tool here started as a chore I kept hitting in my own work: pasting a hex value into a Color(0xFF…) literal, checking whether a color passed contrast, or working out which Kotlin version a given Compose compiler expects. Instead of searching for the same answer each time, I turned each one into a focused page that loads fast, runs entirely in the browser, and never asks anyone to sign in.

What you can expect

Tools that do one job well, with no accounts, no uploads, and no data collection beyond what is described in the privacy policy. Everything runs client-side, so your inputs stay on your device. New tools and short, practical guides are added as I build them.

Who it's for

Android developers who want a quick answer without wading through documentation — whether you are prototyping a design system, migrating a Gradle setup, or estimating ad revenue for a side project. If a tool would save you time, that is a good candidate to add.

Get in touch

Suggestions, corrections and requests are welcome. See the contact page for how to reach me.