What is android-expert?

arisguimera/android-expert — explained in plain English

Analysis updated 2026-06-24

★ 7,322KotlinAudience · vibe coderComplexity · 1/5Setup · moderate

Mindmap

mindmap
  root((repo))
    What It Does
      Android dev course
      Kotlin from scratch
      Spanish language
    Apps Covered
      BMI calculator
      Task organizer
      Superhero API search
      Settings screen
    Learning Format
      Live on Twitch
      YouTube recordings
      Discord questions
    Audience
      Total beginners
      No prior coding needed

mindmap root((repo)) What It Does Android dev course Kotlin from scratch Spanish language Apps Covered BMI calculator Task organizer Superhero API search Settings screen Learning Format Live on Twitch YouTube recordings Discord questions Audience Total beginners No prior coding needed

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What do people build with it?

USE CASE 1

Follow along with a free Spanish-language Android course and compare your code against the reference repository

USE CASE 2

Build a BMI calculator app as your first complete Android project in Kotlin

USE CASE 3

Learn to fetch data from a web API and display it in an Android app by following the superhero search example

USE CASE 4

Create an Android settings screen with night mode support as a hands-on practice exercise

What is it built with?

KotlinAndroid

How does it compare?

	arisguimera/android-expert	aniyomiorg/aniyomi	zetbaitsu/compressor
Stars	7,322	7,286	7,219
Language	Kotlin	Kotlin	Kotlin
Setup difficulty	moderate	easy	easy
Complexity	1/5	2/5	2/5
Audience	vibe coder	general	developer

Figures from each repo's GitHub metadata at analysis time.

How do you get it running?

Difficulty · moderate Time to first run · 30min

Requires Android Studio and an Android emulator or physical device for testing.

So what is it?

This repository holds the source code for a free beginner Android development course taught in Spanish. The course teaches how to build Android apps using the Kotlin programming language, starting from scratch with no programming experience assumed. The curriculum covers Kotlin basics first: variables, functions, conditional statements, arrays, and lists. From there it moves into building actual Android apps. The course builds four complete example apps from start to finish: a BMI (body mass index) calculator, a task organizer, a superhero search app that fetches data from an external web API, and a settings screen that saves preferences and supports a night mode. Screenshots of each app are included in the README. The course runs live on Twitch, where the instructor explains the material and answers questions in real time. Edited recordings are later uploaded to YouTube. At the end of each session, exercises are assigned and reviewed at the start of the next one. Students can ask questions in a dedicated Discord channel. This repository is a learning resource, not a finished app for end users. All the material is free. The repository exists so students can follow along with the code, compare their work, or catch up on earlier lessons.

Copy-paste prompts

Prompt 1

I'm following the android-expert course. Help me build a BMI calculator in Kotlin that takes height and weight inputs and displays the result with a health category label

Prompt 2

I'm a beginner learning Kotlin for Android. Walk me through using a RecyclerView to display a list of superheroes fetched from a REST API

Prompt 3

Help me add night mode to my Android app's settings screen using SharedPreferences so the preference persists after the app is closed

Prompt 4

I'm following the android-expert curriculum. Help me structure a to-do task organizer in Kotlin with the ability to add, check off, and delete tasks

Frequently asked questions