Plzzz read before making an offer - Solar time equation simulator + other add ons

I am looking for someone to combine several simulations into one with the formulas and visualization options

1) https://www.earthspacelab.com/app/solar-time/
2) https://www.earthspacelab.com/app/seasons/
3) https://www.earthspacelab.com/app/moon-phases/

by entering latitude, longitude, elevation, date, time the simulation should cover
1) all solar time details sunrise, sunset, noon, etc
2) angle of sun, angle of shadow, length of shadow
3) arc distance to horizon
4) position on earth
5) moon position, phase and % the moon
6) Polaris and its angle based on the position
7) calculate the atmospheric pressure and the gravity acceleration at that point based on the elevation
8) ability to enter point 2 (latitude, longitude, elevation) and
a) calculate the arc distance and the chord distance between the two points
b) calculate and simulate point 2 show, and the shadow angle difference, and calculate earth circumference from shadows angle difference and the distance
c) calculate earth's circumference based on the Polaris angle difference and distance between the two points
d)calculate the curvature between the two points and how many meters will be visible from point 2 due to curvature and the angle of point 2 due to curvature

PS1: the system should allow playing and adjusting al parameters or reset them to default such as
sun distance, diameter
earth title, diameter and/or degree of curvature, mass (for g)
moon distance, diameter

PS2: all formulas should be incorporated to enable turning this into a mobile app later on in phase 2