Kotlin Multiplatform Story Teller App

Choose a character 🐶🐱 and Gemini AI will generate a bedtime story for you.

Showcase (sound on!)

StoryTeller-Showcase.mp4

Setting up your development environment

To setup the environment, please consult these instructions.

Before running

• Get a Gemini API Key
• Add to local.properties file located in the root directory (create if it doesn't exist): gemini.api_key=YOUR_KEY

Running the Android app

Open project in IntelliJ IDEA or Android Studio and run composeApp configuration.

Running the iOS app

Open project in IntelliJ IDEA or Android Studio and run iosApp configuration.

Or open iosApp/iosApp.xcodeproj in Xcode and run it.

Technologies

The app uses the following multiplatform dependencies in its implementation:

• Compose Multiplatform for UI
• Ktor for networking with Gemini API
• kotlinx.serialization for JSON handling
• moko-mvvm to store and manage UI-related data
• gradle-buildconfig-plugin to expose the Gemini API Key as a constant from local.properties
• PreCompose for navigation between screens

To synthesize speech from the story text, it uses:

• TextToSpeech for Android
• AVSpeechSynthesizer for iOS

How to modify the AI prompt?

If you want the AI to generate other type of stories or make them longer, you can modify the prompt by opening the strings.xml files. You'll find one prompt string per language.

How to add more characters?

Open CharacterRepository and modify getAllCharacters(): Add the character you desire by providing a name, emoji and a background color.

You have to declare the name in the strings.xml files. You'll find one name string per language.