APT (Astro Photography Tool) is described as 'APT stands for "AstroPhotography Tool" and it is like Swiss army knife for your astro imaging sessions' and is an app in the Education & Reference category. There are more than 10 alternatives to APT (Astro Photography Tool) for Windows, Mac, Linux, iPhone and Raspberry Pi. The best alternative is SharpCap, which is free. Other great apps like APT (Astro Photography Tool) are Nebulosity (Paid), Sequence Generator Pro (Paid), BackyardEOS (Paid) and N.I.N.A. (Free, Open Source).
Qastrocam is a capture program to do astrophotography. It can control a telescope to do guiding with the images received from a V4L device. It can also control the extended features of a webcam modified to do long exposure (several seconds) captures.