SunGraph vs Astrolabe Clock
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SunGraph
Calculate sunrise and sunset times for any location globally and any day of the year. Explore earliest/latest times, the equation of time, and sun inclination. Visualize the sun's position on Earth.
- Sunrise and sunset times worldwide
- Earliest and latest sunrise/sunset
- Equation of time display
- Sun inclination at transit
- World view of sun's position
- User location database
Read full descriptionHide full description
SunGraph is a sunrise and sunset calculator showing sunrise and sunset times for anywhere in the world and for any day of the year. For any latitude the earliest and latest sunrise and sunset times will be displayed. The analemma screen displays the equation of time along with the inclination of the sun above the horizon at transit. A world view shows the location of the sun on the Earth for the current time, or any day of the year. A data base can store user locations.
Astrolabe Clock
This app offers a modern interpretation of an ancient astronomical instrument, providing a real-time view of the sky. It displays the time of day, day of the year, and the positions of celestial bodies like the Sun, Moon, planets, and stars. Users can also track sunrise/sunset times, moon phases, and celestial transits.
- Real-time sky view
- Time of day and day of year display
- Sun, Moon, planet, and star locations
- Sunrise and sunset times
- Moon phase tracking
- Celestial transit times
- Eclipse occurrence indicator
Read full descriptionHide full description
Astrolabe Clock is an astronomical clock inspired by the astrolabe, an ancient astronomical instrument used to tell time and to predict the location of the Sun, stars and planets. This modern interpretation gives a view of the sky showing at a glance the time of day, day of year, and the location in the sky of the Sun, Moon, planets and stars. Astrolabe Clock also gives the time of sunrise and sunset, the phase of the Moon, transit times for the Sun, Moon, planets and stars, and can be used to show the occurrence of solar and lunar eclipses.
Screenshots
Verdict
The clearest difference is rating: Astrolabe Clock at 4.7 against SunGraph's 3.1. Astrolabe Clock also leads on review sentiment (91% vs 57%) and update cadence (every 4 weeks vs every 4 months). SunGraph's advantage is iOS requirement (13.0 vs 15.6). On price, ads, in-app purchases and monetization model 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.
Astrolabe Clock holds the better App Store score, 4.7 against 3.1. Both are backed by a comparable volume of ratings — 12 and 48 respectively. Written reviews point the same way: 57% of SunGraph's written reviews are positive against 91% of Astrolabe Clock's.
SunGraph ships an update every 4 months, Astrolabe Clock every 4 weeks. The most recent releases landed on September 18, 2026 and September 15, 2026 respectively.
| Parameter | SunGraph | Astrolabe Clock |
|---|---|---|
| Price | Free | Free |
| Rating | 3.1 (12 ratings) | 4.7 (48 ratings) — better |
| Positive reviews | 56.8% of reviews | 90.9% of reviews — better |
| Number of ratings | 12 | 48 — better |
| Update frequency | Every 4 months | Every 4 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 11 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Tremont Air, LLC | Michael Smith |
Customer experience
SunGraph
Astrolabe Clock
In-app purchases
SunGraph
No in-app purchases
Astrolabe Clock
No in-app purchases
