5-Day Free Course · Android Development

Kotlin in 5 Days: Modern Android Without the Boilerplate

Kotlin is the official Android language and it’s better than Java in every way. This course covers Kotlin idioms, Jetpack Compose for declarative UIs, navigation, Room for local data, and the Play Store publishing process.

5 days self-paced
Free forever
Text + external video refs
No signup required
$python main.py Loading course materials... $pytest -x --tb=short PASSED 5 days $git commit -m "day 5 done" [main] 1 file changed $
5
Days
35+
Code Examples
4+
External Videos
$0
Forever Free

No videos. On purpose.

This is a text-first course that links out to the best supporting material on the internet instead of trying to replace it. The goal is to make this the best course on kotlin and android development you can find — even without producing a single minute of custom video.

Practitioner-tested, not vendor marketing

This course is built by people who ship production kotlin systems for a living. It reflects how things actually work on real projects — not how the documentation describes them.

Code you can run, not demos you can watch

Every day has working code snippets you can paste into your editor and run right now. The emphasis is on understanding what each line does, not memorizing syntax.

Links to the canonical sources

Instead of shooting videos that go stale in six months, Precision AI Academy links to the definitive open-source implementations, official documentation, and the best conference talks on the topic.

Completes in 5 one-hour sessions

Each day is designed to finish in about an hour of focused reading plus hands-on work. You can do the whole course over a week of lunch breaks. No calendar commitment, no live classes, no quizzes.

The 5 Days

Each day stands alone. Read them in order for the full picture, or jump straight to the day that answers the question you have today.

The best external videos on this topic.

Instead of shooting our own videos, Precision AI Academy links to the best deep-dives already on YouTube. Watch them alongside the course. All external, all free, all from builders who ship this stuff.

Read the source. Every line.

The best way to understand any technology is to read the production-grade implementations that prove it works. These repositories implement patterns from every day of this course.

Three kinds of people read this.

Java Android Developers Switching to Kotlin

You write Android apps in Java. Kotlin’s null safety and coroutines alone make the switch worth it. This course makes it fast.

iOS Developers Building Android Apps

You ship Swift apps. Compose’s declarative model maps almost directly to SwiftUI. This course exploits that similarity.

Developers Building Their First Android App

Kotlin and Compose are the right starting point in 2026. This course skips the deprecated patterns and goes straight to the modern stack.

Want to Go Deeper in Person?

The 2-day in-person Precision AI Academy bootcamp covers Kotlin and Android development hands-on. 5 U.S. cities. $1,490. 40 seats max. June–October 2026 (Thu–Fri).

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