AstroPup Sky vs SkySync
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
AstroPup Sky
This application provides a unique sky chart for astrophotographers, displaying celestial object visibility for an entire night. It allows users to personalize their view with custom horizons and receive clear-sky notifications for preferred observing locations.
- All-sky, all-night object visibility
- Object rise and set times
- Personalized horizon views
- Clear-sky notifications
- Supports custom horizon files
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AstroPup Sky is a unique sky chart for astrophotographers. Instead of displaying a single point in time, AstroPup Plan displays the entire sky for an entire night. Celestial objects are fixed but the horizon is in motion, allowing you to determine the time and hours every object is visible. * All-sky, all-night views of object visibility, rise and set times * Personalize your view by adding a horizon file from AstroPup Horizon, N.I.N.A. or Stellarium. * Clear-sky notifications for your favorite observing locations
SkySync
This app helps you discover and track celestial events like meteor showers and eclipses. It provides countdown timers and customizable notifications so you never miss an opportunity to stargaze. It also features a dark sky finder to locate optimal viewing spots.
- Event calendar (meteor showers, eclipses, moons, comets)
- Countdown timers to events
- Customizable notifications
- Dark sky finder with Bortle scale
- Minimalist nighttime design
- No account required
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SkySync tracks upcoming cosmic events and alerts you before they happen — so you're always ready to look up. Features: * Full event calendar: meteor showers, eclipses, full & new moons, comets, planet oppositions, and satellites * Countdown timers to every upcoming event * Custom notifications — get alerted 1 hour, 1 day, 3 days, or 1 week ahead * Dark sky finder — locate the best stargazing spots near you with Bortle scale ratings * Clean, minimal design built for nighttime use No account required. No ads. Just the sky.
Screenshots
Verdict
The clearest difference is ratings volume: SkySync at 4 against AstroPup Sky's 1. SkySync also leads on iOS requirement (15.1 vs 26.0). On price, rating, update cadence and ads 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. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 5.0 for AstroPup Sky against 5.0 for SkySync. Both are backed by a comparable volume of ratings — 1 and 4 respectively.
Both ship on a similar rhythm, roughly weekly. Both last shipped on October 31, 2026.
| Parameter | AstroPup Sky | SkySync |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (4 ratings) |
| Number of ratings | 1 | 4 — better |
| Update frequency | Weekly | Weekly |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 26.0 | 15.1 — better |
| Further details — not scored | ||
| Size | 25 MB | 24 MB |
| Age rating | 4+ | 4+ |
| Developer | Aaron Freimark | KAHLESON MILES BLANCHARD |
Customer experience
AstroPup Sky
SkySync
In-app purchases
AstroPup Sky
No in-app purchases
SkySync
No in-app purchases
