Horizon Capture
Utilities
Only for iPhone
$0.49 · Designed for iPhone. Not verified for macOS.
iPhone
Map your observing horizon with your iPhone. Capture altitude and azimuth, view your profile on a live polar display, and export it for astronomy software.
Horizon Capture turns your iPhone into a simple horizon-mapping tool for astronomy.
Use the camera and built-in motion sensors to sight along your local horizon and record the altitude and azimuth of surrounding obstructions such as trees, buildings, hills and observatory walls.
As you capture points, Horizon Capture builds a live polar representation of your observing horizon so you can immediately see the profile taking shape.
The first captured point is clearly identified, while a live position marker shows where the phone is currently pointing, making it easy to work your way around the horizon.
Designed for astronomers
Horizon Capture is intended for telescope users who need a practical way to map their local observing horizon for planning, automation and observatory configuration.
Features include:
* Live camera sighting view
* Altitude and azimuth measurement
* True-north heading where available
* Heading accuracy indication
* Front and rear camera support
* Live polar horizon display
* Visual start-point marker
* Live current-position marker
* Undo individual measurements
* Export horizon coordinates as .hrz
* Export the same data as plain text
Horizon profiles are stored during your capture session and exported only when you choose.
Whether you are mapping trees from a backyard pier, an observatory wall, a neighbouring roofline or a distant ridge, Horizon Capture provides a quick way to turn the visible horizon into usable Alt/Az data.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Trent McDougall, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Trent McDougall
- Size
- 590.8 KB
- Category
- Utilities
- Compatibility
Requires iOS 26 or later.
- iPhone
Requires iOS 26 or later. - Mac
Requires macOS 26.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 26.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Trent McDougall
