By a solo Android developer

Small, fast tools for
Android & Jetpack Compose.

No sign-up, no clutter. Convert colors, size up your builds, and sort out Gradle versions — the everyday chores, done in one tap. Built and battle-tested while shipping real apps to Google Play.

Live tools

Live Color

Jetpack Compose Color Converter

HEX to Color(0xFF…), plus XML, RGBA, HSL, an alpha slider and a WCAG contrast check.

Coming soon

Soon Layout

dp / sp / px Converter

Convert between density-independent units across every screen density bucket.

Soon Revenue

AdMob eCPM Estimator

Estimate ad revenue from impressions, fill rate and eCPM by region.

Soon Build

AGP · Kotlin · Compose Version Check

Find a compatible set of Gradle plugin, Kotlin and Compose compiler versions.

Soon Reference

API Level ↔ Version Lookup

Map an Android API level to its version number and codename, and back.

Why these tools exist

Every one of these started as a chore I hit while building and publishing my own Android apps — pasting a hex into a Color(0xFF…) literal, checking whether a color passed contrast, working out which Kotlin version a Compose compiler wants. Instead of searching each time, I turned them into small single-purpose pages that load fast, run entirely in your browser, and never ask you to sign in. New tools land here as I build them.