Hi. I made this interactive learning tool designed to help me study using the spaced repetition technique. I use this to review python syntax, but you can use it for anything (biology, history, or whatever). I built this using Streamlit and Supabase for cloud database storage. Here's the list of features I made:

• Enter a question and its answer
• It appears in today's review list
• Once marked reviewed, it reappears after 3, 6, 12 days, and so on
• This increasing interval follows a spaced repetition schedule

• View all added questions
• Edit or remove questions anytime

• Daily review count visualized like GitHub contribution heatmaps
• Check which questions you reviewed on a specific date

• View all questions due for today
• Start reviewing with a single click

• Write your answer
• Click “Reveal Answer” to check correctness
• Mark as reviewed to schedule it for the next interval

• Frontend: Streamlit
• Database: Supabase (PostgreSQL backend)
• Visualization: Plotly (for daily activity heatmap)

This is the MVP, so I haven't made account login yet to track it by user, but if you want to use this, you can easily setup yourself. Here's the steps:

git clone https://github.com/your-username/spaced-repetition-learning-app.git
cd spaced-repetition-learning-app

pip install -r requirements.txt

Create .streamlit/secrets.toml:

SUPABASE_URL = "supabase-project-url"
SUPABASE_KEY = "anon-key"

streamlit run streamlit_app.py

If using local: $env:LOCAL="1" streamlit run streamlit_app.py

• Hosted on Streamlit Cloud
• Uses Supabase for data storage

Enjoy! :)