Math Queen / Math King vs Circuit Design

Math Queen / Math King – Master Mathematics Through Play Learning math has never been more fun! Math Queen and Math King combine mental arithmetic, logic, and concentration in an entertaining puzzle game suitable for all ages. Every game creates a brand-new set of math challenges. Some numbers are missing, and it's your job to drag the correct numbers into the right places. Complete every equation to finish the round successfully. Because the puzzles are generated again and again, every game is different and offers a fresh challenge. Features • Unlimited randomly generated math puzzles • Simple and intuitive drag-and-drop controls • Practice addition, subtraction, multiplication, and division • Improves mental arithmetic and logical thinking • Enhances concentration and memory • Built-in timer to challenge yourself • Error counter to track your progress • Suitable for children, students, and adults • Perfect for learning, school, and daily brain training Whether you want to improve your math skills, keep your mind sharp, or simply enjoy solving clever number puzzles, Math Queen and Math King are the perfect companions. How fast can you solve every puzzle?

Circuit Design is a powerful and intuitive circuit simulator and schematic editor for iPhone and iPad. Build electronic circuits with drag-and-drop components, simulate voltage and current in real time, and learn electronics through interactive tools and visual analysis. Create professional circuit diagrams using resistors, capacitors, transistors, LEDs, logic gates, microcontrollers, and more. Watch live current flow animations, analyze voltage levels, and test designs instantly with the built-in simulation engine. Perfect for students, engineers, makers, Arduino enthusiasts, and anyone learning electronics. FEATURES • Modern drag-and-drop circuit editor • Real-time circuit simulation • Interactive voltage and current visualization • Huge electronic component library • Smart wire routing and snap-to-grid design • Oscilloscope and waveform preview • PCB layout preview mode • Apple Pencil support on iPad • AI-powered circuit suggestions and error detection • Educational tutorials and guided projects • Dark mode optimized interface • Export circuits as PNG, PDF, and SVG • Cloud sync and project backup Whether you're designing simple LED circuits or advanced electronic systems, Circuit Design gives you a portable electronics lab directly on your device. The App offers two subscription options: -$7.99 Monthly -$29.99 Yearly Prices may vary by location. Privacy Policy: https://privacy.vanlangapps.com Terms of Use: https://tos.vanlangapps.com Should you choose to upgrade to a Pro subscription, payment will be charged to your iTunes account at confirmation of purchase. Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. Account will be charged for renewal within 24-hours prior to the end of the current period. You may cancel automatic renewal and manage your subscription by selecting Manage App Subscriptions in your iTunes Account settings and selecting the subscription you want to modify. Any unused portion of a free trial period, if offered, will be forfeited when you purchase a Pro subscription, where applicable.