# Horizon Capture

> Horizon Capture (iPhone/iPad app by Trent McDougall.)

- Source: https://appshunter.io/ios/app/horizon-capture/id6806688632 (this page in markdown: same URL + `.md`)
- Developer: [Trent McDougall](https://appshunter.io/developer/1773337521)
- Category: Utilities
- Price: $0.49
- Age rating: 4+
- Requires: iOS 26 · 1 MB
- Languages: American English
- Released: 2026-09-04
- Data updated: 2026-10-01
- User reviews in markdown: https://appshunter.io/ios/app/horizon-capture/id6806688632/reviews.md

## What is Horizon Capture?

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.


## Version history (last 3 releases)

### 1.7 — 2026-09-29

This update adds improved tools for refining and exporting your captured horizon:
• Edit captured horizon points directly on the polar display.
• Rotate the complete horizon in 1° increments to correct heading alignment.
• Apply local azimuth corrections using adjustable arcs around the polar plot.
• Add or subtract a horizon buffer in 1° increments.
• Improved selection and deselection while editing horizon points.
• Choose your own file name when exporting .hrz or .txt horizon files.
• General interface and usability improvements.

### 1.4 — 2026-09-25

his update improves how captured horizons are viewed, managed and refined.

• Added an interactive polar horizon display directly over the camera view.
• Added horizon editing — captured points can now be repositioned by dragging them on the polar display.
• The first captured point is now clearly identified, making it easier to see where a horizon survey began.
• Added the ability to clear the current horizon and start again.
• Improved horizon shading, including correct display across the 0°/360° North boundary.
• Added front and rear camera switching to make high-altitude horizon measurements easier.
• Improved horizon persistence so captured and edited profiles are retained between sessions.
• Improved horizon import and export workflow.
• Improved the capture interface and sensor display.
• Improved responsiveness while capturing and reviewing a horizon.
• General stability and usability improvements.

### 1.0 — 2026-09-05

No release notes.

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## More apps by Trent McDougall

- [bomblebee](https://appshunter.io/ios/app/bomblebee/id6736817910)
- [ChrOhm](https://appshunter.io/ios/app/chrohm/id6737160092)
- [MoleChron](https://appshunter.io/ios/app/molechron/id6737791600)
- [BiChron](https://appshunter.io/ios/app/bichron/id6739436898)
- [MusiChron](https://appshunter.io/ios/app/musichron/id6742981620)

All apps by Trent McDougall: https://appshunter.io/developer/1773337521

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-01.*