Know where the sun will set

Every screen, straight from the App Store

Swipe through all 7 screenshots of Asterfold.

What Asterfold does

Asterfold is a sunset planner for the places you actually watch from. See where the Sun will set, aim your viewpoint, plan the evening, then record what the sky really did.

• A sky dome draws the Sun's real path for any place and date, coloured by golden hour, blue hour and twilight

• Scrub through the day for the Sun's altitude, bearing and shadow length

What's inside Asterfold

• A sky dome draws the Sun's real path for any place and date, coloured by golden hour, blue hour and twilight
• Scrub through the day for the Sun's altitude, bearing and shadow length
• The year's range of sunset and sunrise directions on the rim, plus shortcuts to the year's key dates
• Calculated on your iPhone, so it works offline
• Save the exact spot you shoot from, then turn toward your shot on a first-person horizon, like turning your head
• Pick your lens (14 mm to 200 mm, or your phone's camera) and the frame widens or narrows to match

Quick answers

How much does Asterfold cost?

Free to download (optional in-app purchases) — as listed on the App Store.

What does Asterfold need to run?

An iPhone on iOS 18.0 or later. The download is about 10 MB.

What is Asterfold for?

Asterfold is a sunset planner for the places you actually watch from. See where the Sun will set, aim your viewpoint, plan the evening, then record what the sky really did.