A methodical deep-sky session planner for iPhone & iPad.

Every popular deep-sky object, planet & comet at once — altitude curves colored by type, drifting through the seasons.

Reveal real dust vs. gradients in your target — WISE/IR survey overlays, blink & blend.

What the f-number actually measures, on a chalkboard — plus a split test for your own scope, sky and pixels.

Frame any target for any scope + camera before you shoot.

Browse your Celestron Origin captures and check histograms / dither.