Apps like Star Trail Calculator

Here are some great alternatives to Star Trail Calculator by Scott J. Waldron :
Photo Tools PRO
Photo Tools PRO
★4.4
Photo Tools
Photo Tools
★3.6
Star Trails
Star Trails
★3.7
Photo Tools
Photo Tools
★3.5
ND Filter Calc (DSLR)
ND Filter Calc (DSLR)
★4.7
TimeLapse Calculator
TimeLapse Calculator
★4.5
FotoTool - Photographer Tools
FotoTool - Photographer Tools
★4.5
Photography Calculator Tools
Photography Calculator Tools
★4.2
Telescopius
Telescopius
★4.6
Ephemeris: Sun and Moon Seeker
Ephemeris: Sun and Moon Seeker
★3.5
CAL20000 STAR MAP
CAL20000 STAR MAP
★5.0
Meet Star Gazers
Meet Star Gazers
★4.4
DWARFLAB
DWARFLAB
★3.9
Lightmeter
Lightmeter
★4.5
Photographer's companion Pro
Photographer's companion Pro
★4.7
Camera FV-5 Lite
Camera FV-5 Lite
★4.0