9-Box

📱 About the app

9-Box is a simple app to practice all 81 multiplications from 1×1 to 9×9. Designed to be clear, fast, and distraction-free. The first version was created in 2015 — this is a complete rebuild and a personal tribute.

Free · iOS & Android

✨ Features

• Practice all 81 multiplications from 1×1 to 9×9
• Two modes: Plus+ (with hints) and Pro (no hints)
• Track your best times and beat your own records
• Works fully offline
• Clean, focused design

🔒 Privacy

The app does not collect personal data and does not share anything with third parties. The app may display ads. You can remove ads with a one-time in-app purchase.

→ Read the full privacy policy

📬 Contact

Questions? Feel free to reach out: info@9-box.eu