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  • #: 236530
  • Price: $0.99 In Apple Store
  • Category: Utilities
  • Updated: 2011-01-03
  • Current Version: 1.1
  • 1.1 (iOS 4.0 Tested)
  • Size: 0.20 MB
  • Language: English
  • Seller: Diatom Software LLC
  • Requirements: Compatible with iPhone, iPod touch, and iPad. Requires iOS 3.1.3 or later
  • © 2010 Diatom Software LLC
  •  Add to Favorite apps



AstroClock is an astronomical clock designed for field use by amateur astronomers. It includes your local date and time, Greenwich Mean Time (GMT), Local Sidereal Time (LST), and Julian Date (JD) with up to six decimal point precision. The sidereal clock provides a convenient method for observation planning, and for calibrating your telescope's setting circles. AstroClock is an essential tool for the advanced amateur making time-sensitive observations of variable stars, sun spots, planets, comets, asteroids, and star occultations.


- Desktop AND Night Vision mode

- Large numerical display for optimal clarity

- Pause/Resume button simplifies observation recording

- 12h or 24h clock display

- Option to disable idle lock

- Julian Date (JD) or Modified Julian Date (MJD)

- Automatic geographical longitude detection with manual override.

- All preferences are saved between sessions

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Rated 4/5 based on 1 customer reviews.


4/5 stars

Does exactly what it says in description.

Finally, an astronomy clock! I would like to see lockable horizontal format (for easier tailstanding) and ntp sync in future updates. Love the simple format and red light mode.


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The information may be outdated (2011-04-30 21:41:04). For actual information go to iTunes

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