Startrails Stacker is a simple desktop app that combines multiple night-sky photos into a single long-exposure star trails image. It automates the stacking process so you can create smooth, continuous star trails in just a few clicks, straight from your RAW files.

Startrails Stacker is perfect for:

• Beginners trying astrophotography for the first time

• Hobbyist photographers who want fast results

• Advanced users who want a lightweight, no-subscription stacking tool

You don’t need deep technical knowledge to use it.

Instead of taking one very long exposure, you capture many shorter photos of the night sky. The app then blends the brightest pixels from each image to create the star trail effect — reducing noise and avoiding overexposure.

Processing time depends on:

• Number of images

• Image resolution

• Your computer’s performance

Most stacks complete in seconds to a few minutes.