mobile applications


Sunrise, sunset, midday and – most important – shadow calculation for self defined obstructions. Works for arbitrary locations and dates. Available for iPhone.

Number Walls

Math education for iOS devices. Calculation with positive and negative numbers, fractions and remainder.

Dusk Till Dawn

Calculation of astronomical, nautical and civil twilight for current date and position. Running on GARMIN bravo, epix and fenix3 watches.

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