Amateur Radio Toolkit is the best app for ham radio hobbyists. It contains many calculators to help you design radios and antennas for all your projects. Tools: Coordinate calculator - Find your latitude and longitude by entering your maindenhead square. Grid square calculator - Find your maindenhead square by entering your latitude and longitude Distance calculator - Find the distance between tw... - More info on Amateur Radio Toolki...

Electronics Toolkit is a helpful app with dozens of tools, calculators and references made for electronic engineers, students and hobbyists. Features: Calculators: • Resistor color codes - calculate the resistance of resistors by selecting the colors of the bands • SMD resistor codes - calculate the resistance of SMD resistors by entering the number • LED resistor calculator - calculate... - More info on Electronics Toolkit!...

Physics Toolkit is a physics calculator that can be used for physics calculations. It contains many calculators and tables, a list of common formulas and information about all elements. Physics Toolkit is a must-have app for physics students and professionals. Calculators: • Displacement • Acceleration • Newton's second law • Gravitational acceleration • Hooke's law • Momentum • Wo... - More info on Physics Toolkit...

Weight Calculator For Metals is a metal weight calculator that lets you calculate the mass or length and price of many different shapes of metals. You can choose between many metals or add your own. The app can also calculate the total weight if you enter the quantity and it can also calculate the total price if you also enter the price per unit of weight. You can choose between millimeter, cen... - More info on Weight calculator fo...

Make maths easy with this app! This app contains a list of all common derivatives. Click on the formula to get the derivative. You can view derivative rules; basic, exponential, logarithmic, trigonometry and hyperbolic functions, or show all formulas at once. You can upgrade to the pro version for even more formulas.... - More info on Math Derivatives...

Physics Toolkit is a physics calculator that can be used for physics calculations. It contains many calculators and tables, a list of common formulas and information about all elements. Physics Toolkit is a must-have app for physics students and professionals. Calculators: • Displacement • Acceleration • Newton's second law • Gravitational acceleration • Hooke's law • Momentum • Wo... - More info on Physics Toolkit Pro...

Learn to write over 10,000 unique Chinese characters with this simple app! All characters come with an animation that shows the order of the strokes. Each character also comes with a definition, pinyin pronunciation, etymology, and multiple sentences. All characters are easily accessible in a list or can be found with the search function, which lets you search on pinyin (with or without tone) or... - More info on Chinese stroke order...

Features: Calculators: • Resistor color codes - calculate the resistance of resistors by selecting the colors of the bands • SMD resistor codes - calculate the resistance of SMD resistors by entering the number • LED resistor calculator - calculate the needed resistance to connect en LED to a power source • Parallel resistors - calculate the resistance of resistors in parallel • Vo... - More info on Electronics Toolkit ...