Solve puzzles by filling 9×9 grids with digits 1-9. Choose from four difficulty levels. Store notes for possible numbers. Use hints to fill missing digits. Complete daily challenges. Clear grids when all numbers are placed.
And counting in , Portuguese, and Catalan. Translate digits to words instantly. Use calculator-style or odometer-like wheels for number input. Practice with flashcards to recognize quickly.
Learn languages by speaking confidently in real-life
Learn languages through real-life conversation practice. Practice speaking, listening, and responding with native speakers. Track progress with lesson history and performance reports. Set goals for vocabulary and grammar mastery.
Memorize digits with customizable Piems and voice recitation. Track progress with performance stats and sound effects. Reverse digit order for practice. Compete with friends via Center. Set high scores and challenge others.
Learn addition and subtraction using a Soroban . Move beads to perform calculations. Practice basic math operations. Track progress with interactive exercises. Sync with devices for continued learning.
Calculate expenses, split bills, and track budgets with a clean interface. Input numbers directly or use pre-set formulas. View detailed breakdowns and export results. Sync data across devices for consistent access.
Calculate fractions with addition, subtraction, multiplication, and division. Convert fractions to decimals. Adjust recipe quantities for different serving sizes. Review math problems and convert measurements between cups and teaspoons.