Designing a shared daily trivia set in Flutter (without an account wall)

I recently launched a trivia application called Trivia Quest. The core concept is simple: every day, players receive a set of ten questions in their language, with brief explanations provided for most incorrect answers. There are no ads or social features, and playing solo does not require an account. This post focuses on the daily loop, which is distinct from friend rooms and monetization strategies.

The primary focus of the app is creating a habit. Most existing trivia apps start with creating an account, assigning players to various modes, and comparing scores against strangers. However, this app aims to open immediately, allowing users to answer ten questions and read explanations for any incorrect responses before closing the app. This approach has a few key constraints:

1. Shared content is essential, as players need to compare scores and discuss today's question #7.

2. The user experience should be frictionless, avoiding account creation barriers.

3. Explanations should be concise and respect the user's attention span.

To address these constraints, the app uses a seeded random number generator to select the same ten questions for everyone in a given locale (language and location) each day. This approach ensures fairness, simplicity, and scalability, as the same questions are used daily for thousands of users across different categories.

When a user opens the app, the system determines the daily seed based on the current date and locale, then retrieves the corresponding set of questions from Firestore. Explanations are required for medium and hard questions, while easy questions may omit them. The app supports various settings, allowing users to adjust the difficulty and auto-advance options to their preference.

While the initial focus is on creating a daily habit, the app also supports category play for users seeking a smoother difficulty curve. Content is stored in Firestore, with separate progress tracking for solo play to ensure privacy. The app uses Firebase Auth only when users opt-in to friend rooms, keeping the solo experience simple and secure.

Future improvements may include friend competition, speed scoring, and a web entry point. However, the primary goal right now is to refine the daily habit aspect of the app. The team is seeking feedback on the user experience, particularly regarding the timing of explanations after wrong answers.