Sky Time vs Luminos Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sky Time
This app provides essential astronomy-related time data, including Julian Date, Universal Time, and Sidereal Time calculated using your device's location. It features a night-vision friendly red display and pop-up descriptions for easy understanding.
- Displays local, Julian, Local Sidereal, and Universal Time
- Calculates Sidereal Time using device location
- Night-vision friendly red display
- Pop-up descriptions for time data
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Sky Time is a simple app that displays Astronomy related times, including Julian Date and Universal Time. It also makes use of your device's ability to sense location to determine the Sidereal Time. Sky Time is a useful tool to have to hand when setting up your telescope! * Displays local, Julian, Local Sidereal and Universal Time. * Night-vision friendly red display. * Pop-up descriptions of the times at your fingertips.
Luminos Pro
Explore the cosmos with an all-in-one astronomy companion. Discover stars, planets, galaxies, and celestial events with extensive databases and interactive 3D models. Enhance your stargazing with augmented reality, virtual reality, and personalized viewing recommendations.
- Star gazing and 3D galaxy exploration
- Extensive databases of celestial objects
- On-device and custom recommendations
- Motion tracking with AR and VR modes
- 3D flight to satellites and spacecraft
- Weather forecasts for stargazing
- Telescope control and observation lists
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Discover the Universe in High Definition Luminos Pro is a massive, all-in-one astronomy suite that brings the entire cosmos to your mobile device. Built around the largest offline databases available in any mobile astronomy app, Luminos Pro combines professional-grade data with stunning 3D graphics to deliver a fully customized stargazing experience—no internet connection required. Whether you are pointing your device at the sky using real-time AR motion tracking or flying across the galaxy in 3D, Luminos Pro makes the mysteries of the universe accessible to newcomers and seasoned astronomers alike. EXPLORE FOR FREE: * Massive Base Catalog: Over 5 million stars, deep-sky Messier objects, constellations, and meteor showers. * Our Solar System: Track all planets, moons, active comets, and bright satellites. * Time Travel: Explore 5,000 years of solar and lunar eclipses. * Immersive AR/VR: Seamless motion-tracking modes to identify objects overhead instantly. * Ecosystem Support: Includes an Apple Watch companion app and iOS Desktop Widgets. UNLOCK THE COSMOS (Subscription or All-Access Pass): Go beyond the backyard with deep-space navigation, professional catalogs, and advanced hardware integration. * 3D Space Flight: Leave Earth behind. Ride along with spacecraft, orbit exoplanets, or fly directly to distant stars and star clusters. * Professional Space Catalogs: Access over 250 million Gaia DR3 stars, the Washington Double Star Catalog, the GCVS, and every asteroid tracked by the Minor Planet Center. * Equipment & Telescope Control: Seamlessly connect to and control your telescope rig directly from the app. * Advanced Planning Tools: Get hyper-local weather forecasts, custom observation lists, and comprehensive nightly viewing recommendations on-demand. From casual stargazing to advanced astrophotography planning, Luminos Pro combines unmatched data depth with a beautiful, intuitive design. Unlock the universe today! End User License Agreement: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is rating: Luminos Pro at 4.7 against Sky Time's 4.2. Luminos Pro also leads on ratings volume (251 vs 17) and review sentiment (70% vs 60%). Sky Time's advantage is in-app purchases (none vs 5) and iOS requirement (10.0 vs 18.6). On price, update cadence, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Luminos Pro sells 5 in-app purchases, starting at $1.99 per month. Sky Time asks for nothing beyond the download.
Luminos Pro holds the better App Store score, 4.7 against 4.2. That said, the two scores are not equally well evidenced: Luminos Pro has 251 ratings behind it against 17, so its average is the more settled of the two. Written reviews point the same way: 60% of Sky Time's written reviews are positive against 70% of Luminos Pro's.
Sky Time ships an update every 2 months, Luminos Pro every 4 weeks. The most recent releases landed on September 21, 2026 and September 27, 2026 respectively.
| Parameter | Sky Time | Luminos Pro |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (17 ratings) | 4.7 (251 ratings) — better |
| Positive reviews | 60.0% of reviews | 69.8% of reviews — better |
| Number of ratings | 17 | 251 — better |
| Update frequency | Every 2 months | Every 4 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Freemium |
| Devices | iPhone, iPad, iPod, Apple Watch — better | iPhone, iPad, Apple Watch |
| Requires iOS | 10.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 1 MB | 1.8 GB |
| Age rating | 4+ | 4+ |
| Developer | John Kennedy | Wobbleworks LLC |
Customer experience
Sky Time
Luminos Pro
Bugs and requests
Sky Time
Not enough reviews yet to summarise bugs or requests.
Luminos Pro
Reported bugs
5 issues- Satellite updates don't work
- Deep sky objects not showing
- App crashes when adding notes
- Old notes disappeared after update
- App keeps going black during exploration
Requested features
5 requests- Discount for lifetime license
- Ability to transfer FOV and camera rotation to NINA
- Ability to add pictures of viewed places and store them
- Store and recall settings
- Update for iOS 16 compatibility
In-app purchases
Sky Time
No in-app purchases
Luminos Pro
- Monthly subscription1 Month trial$1.991 Month
- Quarterly subscription1 Month trial$3.993 Months
- Yearly subscription1 Month trial$12.991 Year
- Lifetime pass$24.99
- Lifetime pass$39.99
