Showing 241–260 of 1,000 ranked alternatives.
Frank Reed
Compare celestial altitudes and track live data
Compare observed celestial altitudes with live calculated values for precise navigation. Tap to pause and receive instant feedback. Access data for the Sun, Moon, Venus, Mars, Jupiter, Saturn, 57 navigational stars, and Polaris.
Jubbly Pty Ltd
Practice dates and track your progress
Learn to calculate the day of the week for any between 1800 and 2200 using the Doomsday Algorithm. Track progress with personal times. Compare results with calculated values. Save custom mnemonics for special dates in the Doomsday List.
Xiang Dong
Capitals, maps, and currencies
Information including capitals, maps, and currencies through interactive lessons and quizzes. Choose topics like flags or currencies and select continents to focus on. Practice with varying difficulty levels and test knowledge with challenges.
Piet Jonas
Calculate means and standard deviations.
The app calculates arithmetic mean, geometric mean, and harmonic mean. It also computes standard deviation and confidence intervals for saved data sets, with results available for emailing.
New York Hall of Science
Record motion, tap points, explore
Record videos of yourself or others and tap points to trace motion paths. Analyze forces, energy, and motion in real-time. Educators can create interactive lessons using the ’s tools and share resources with a community of teachers.
V PUGAZHENTHI
Calculate and convert parameters
Calculate hydraulic parameters such as capillary rise, viscosity, and hydrostatic pressure. Convert between metric and imperial units. Determine velocity head, specific energy head, and total energy. Assess head loss using the Bernoulli equation.
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