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AdvSunMoon: compute the position of Sun & Moon for any date/time/world location. See the rise/set times and alt/az of the sun & moon, including where …

MathGym exercises your brain with math problems of chosen difficulty. Just two minutes a day keeps you sharp! +, -, x, and /, include neg or large num …

MathGymLite is a free lite version of the MathGym app. Just 2 minutes/day and you'll keep your brain sharp and keen! You are asked ten simple math …

SunMoon computes rise/set times of the sun and moon for your GPS location. Also: solar noon time and sun altitude, sun alt/az, moon phase.Advanced use …