Effective Android

Android Development Is Changing Fast. Don’t Be the Engineer Catching Up Later.

Proficient Android AI teaches Android engineers how to get ahead with AI agents now: better output, fewer wasted tokens, more deterministic results, and…

Aug 25 • Jorge Castillo

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May 2026

The Downsides of Agentic Skills

Skills are seductive.

May 17 • Jorge Castillo

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Feature Graphic Google Play quick and easy

Introducing the fastest way to generate feature graphic for Google Play out there 🔥

May 7 • Jorge Castillo

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April 2026

Introducing Compose Loaders: a curated collection of copy-paste animated loaders for Jetpack Compose 🌀

A few days ago I stumbled upon a sick loading animation someone built for React… so I decided to port it to Jetpack Compose.

Apr 3 • Jorge Castillo

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March 2026

A Claude Skill to Generate Professional App Store Screenshots ❤️‍🔥

I built a Claude Code skill that generates production ready screenshots for your app and deploys them to a powerful online editor so you can iterate as…

Mar 23 • Jorge Castillo

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The Droid Club: An exclusive private AI tinkering community for Android devs ⛏️🤖

I created this limited community for Android devs who want to step forward, explore AI, build tools and automations, and not be left behind. It is time…

Mar 14 • Jorge Castillo

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Get 12 testers for 14 days for FREE - Introducing get12testers.com 🧪

A platform where Android devs help other Android devs to overcome this hard requirement from the Google Play console.

Mar 14 • Jorge Castillo

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February 2026

ScreenshotWhale big price drop (temporary)

Available first for subscribers of this newsletter and the Discord community

Feb 2 • Jorge Castillo

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January 2026

I love building apps. Designing App Store screenshots not that much 😅

Most developers don’t have a designer eye, and that’s completely okay.

Jan 22 • Jorge Castillo

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Shortcutting the App Store screenshot generation process for forever (expiring 50% discount)

Removing the final bottleneck for vibe coders building mobile apps 🚀

Jan 12 • Jorge Castillo

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December 2025

October 2025

Manifest Android Interview 30% OFF and full Compose Stability Inference guide written by Jaewoong Eum 🔥

Exclusive price and resources for the newsletter subscribers only

Oct 17, 2025 • Jorge Castillo

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