Comparison

SunGraph vs AstroNav SkyDial

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 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 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.

About

AstroNav SkyDial

Visualize celestial movements in real-time with a dynamic dial showing the sun, moon, and planets. Explore upcoming astronomical events and plan your stargazing sessions.

Highlights
  • Real-time sun and moon tracking
  • Planetary movement visualization
  • Interactive sky dial
  • Event feed for stargazing opportunities
  • 48-hour forecast slider
  • Zodiac constellation identification
Features
Read full description

Track the sun, moon moving above you in real time with solar and moon rise / set. AstroNav keeps track of planetary movement as the day progresses, highlighting the sun, moon, planets, and zodiac constellations. Drawn as a single living dial, AstroNav shows that "now" is always a moment under the stars. PLAY THROUGH THE DAY Tap play and watch your day unfold — the sun climbs and sets, the moon rises, the light shifts hour by hour, each event lighting up as it passes. Or slide through a 48-hour window and jump to any date to see where the sun, moon, and planets will be. The dial, the light, and the sky move with you. WHEN TO LOOK UP The events feed knows when the sky is worth stepping outside for — the clear, dark, moonless windows best for stargazing, alongside full moons, meteor showers, conjunctions, equinoxes, and more. No alerts, no nagging; it's simply there when you open it. INTERACTIVE SKY DIAL Quickly identify celestial bodies overhead based on your current time and estimated position. Prepare your star sights before twilight. Privacy Policy: https://timespaceatlas.com/privacy Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

SunGraph4 screens
AstroNav SkyDial4 screens

Verdict

The call

The clearest difference is review sentiment: AstroNav SkyDial at 100% against SunGraph's 57%. AstroNav SkyDial also leads on rating (5.0 vs 3.1) and update cadence (every 2 weeks vs every 4 months). SunGraph's advantage is in-app purchases (none vs 2) and ratings volume (12 vs 2). On price, ads, monetization model 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. AstroNav SkyDial sells 2 in-app purchases, starting at $1.99 per year. SunGraph asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

AstroNav SkyDial holds the better App Store score, 5.0 against 3.1. That said, the two scores are not equally well evidenced: SunGraph has 12 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 57% of SunGraph's written reviews are positive against 100% of AstroNav SkyDial's.

UpkeepUpdate frequency

SunGraph ships an update every 4 months, AstroNav SkyDial every 2 weeks. The most recent releases landed on September 28, 2026 and October 12, 2026 respectively.

Scorecard6 real differences · 4 level
SunGraph versus AstroNav SkyDial: the parameters behind the verdict, then further details
ParameterSunGraphAstroNav SkyDial
PriceFreeFree
Rating3.1 (12 ratings)5.0 (2 ratings) — better
Positive reviews56.8% of reviews100.0% of reviews — better
Number of ratings12 — better2
Update frequencyEvery 4 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFreeFree
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad, Apple Watch
Requires iOS13.0 — better17.0
Further details — not scored
Size11 MB106 MB
Age rating4+4+
DeveloperTremont Air, LLCTimespace Atlas, LLC

Customer experience

SunGraph

All ratings12 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews37 reviews
Positive56.8%
Neutral10.8%
Negative32.4%

AstroNav SkyDial

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

SunGraph

No in-app purchases

2 purchases

AstroNav SkyDial

Subscriptions1
  • AstroNav Pro Annual$1.991 Year
One-time1
  • AstroNav Pro (Lifetime)$9.99

Questions

Is SunGraph free?
SunGraph is free to download, with no in-app purchases.
Is AstroNav SkyDial free?
AstroNav SkyDial is free to download, with in-app purchases available.
Which has better reviews, SunGraph or AstroNav SkyDial?
AstroNav SkyDial is rated higher. SunGraph averages 3.1 out of 5 from 12 ratings, while AstroNav SkyDial averages 5.0 from 2 ratings.
Do SunGraph or AstroNav SkyDial have ads?
Neither SunGraph nor AstroNav SkyDial shows ads.
Which is updated more often, SunGraph or AstroNav SkyDial?
SunGraph ships an update every 4 months, and AstroNav SkyDial every 2 weeks. Most recently, SunGraph was updated on September 28, 2026 and AstroNav SkyDial on October 12, 2026.

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