Smartfish, a mobile game to improve my general knowledge

I have always been drawn to mobile app development, but a lack of time and concrete opportunities had so far kept me from getting started. The idea for Smartfish came from a simple observation: general knowledge quiz games already exist, but few offer a modern, customizable, and engaging mobile experience. By combining my interests in development, artificial intelligence, and general knowledge, I wanted to build a project that would let me have fun while learning, and share that experience with my friends.

Context and inspiration

Smartfish is a general knowledge quiz game designed to challenge players across multiple categories (history, geography, sports, music, cinema, etc.). The goal was to develop an application that feels smooth, modern, and visually appealing, with an iconic mascot to strengthen the product identity.

The inspiration came from existing games, but also from the expression "goldfish memory", which naturally led to the choice of a fish as the mascot. This customizable and interactive character sits at the heart of the user experience.

Key features

To make the app engaging and addictive, I included several mechanics:

• Varied quizzes: Questions across many categories, generated and validated through a multi-agent workflow (see below).
• Custom flashcards: Players can save and review the questions that interest them most.
• Complete onboarding: A smooth flow that guides new users toward signing up.
• Streak system: An incentive to play every day, represented by water drops that purify the fish’s pond. The fish’s mood changes based on answers and consistency.
• Fish customization: Costumes and accessories to strengthen players’ attachment to the character.
• Progression and rewards: Levels, leaderboards, and customizable notifications to keep engagement high.
• Multiplayer mode: Players can create groups with friends and compete on the same questions every day, with a visible leaderboard.

Design and visual identity

Smartfish’s design was built progressively, inspired by the mobile games I enjoy. The focus was placed on:

• A strong visual identity, with the fish as the central element.
• Fish customization, with costumes and accessories shown throughout the app to create an emotional connection with players.
  

  

Question generation

To ensure the quality and diversity of the questions, I built a multi-agent workflow based on LangGraph:

• An upstream workflow: Breaks down a broad topic into subtopics or key facts to ensure exhaustive coverage.
• An author: Generates questions from a given topic.
• A validator: Validates the quality of generated questions (LLM-as-a-Judge based on another model to avoid self-confirmation bias).
• Enrichment agents: Improve formatting, difficulty, and relevance.

This approach makes it possible to generate varied, accurate, and difficulty-appropriate questions.

The questions are generated in advance and stored in a database to guarantee a smooth and fast experience for players, while also keeping LLM usage costs under control.

Current status and outlook

Today, Smartfish is fully functional and currently in internal testing with a group of 25 people. Their regular feedback helps me continuously improve the application. The release on the App Store and Google Play is planned for the coming months.