Comparison

Cassini HD vs AstroPic

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

Head to head
About

Cassini HD

Explore Saturn and its moons through a stunning collection of over 960 NASA images. Navigate an alien world with interactive maps and detailed captions. Save and share your favorite discoveries.

Highlights
  • Over 960 NASA images of Saturn and moons
  • Interactive navigation map and thumbnails
  • Detailed image captions
  • Add images to favorites
  • Save images to photo roll
  • Social media sharing
Features
Read full description

Come on a voyage of discovery to the ringed planet of Saturn with Cassini HD for iPad and iPhone. Navigate a collection of more than 960 spectacular images returned to Earth by NASA's Cassini orbiter while learning about this alien environment in our celestial backyard. The Cassini HD photo collection was carefully selected from thousands of images available courtesy NASA/JPL-Caltech. Browsing this collection takes you on a journey from Saturn itself, beyond its stunning rings, and past more than 20 of its moons. Additional information about each image can be revealed with just a tap. With multiple ways to navigate, Cassini HD becomes an immersive experience guided by your own curiosity: an alphabetical men takes you to any point of interest, while a unique navigation map and thumbnails view allow you to easily scroll through this vast collection. Add images to your favorites to access them quickly, or save them to your photo roll to use as wallpaper or enjoy anytime. Integration with social media adds to the fun as you share your discoveries with family and friends. FEATURES • Journey from Saturn itself, to its stunning rings and past more than 20 different moons • Supports both portrait and landscape orientation for optimal viewing quality. • Full captions expand with additional information with just a tap • Alphabetical menu brings you directly to any section of interest; unique navigation map and thumbnails allow you to scroll easily through this vast collection • Integration with the most popular social networks: Share your discoveries with friends on Facebook and Twitter, or via email • Add images to your favorites for easy access • Save your favorite images to your photo roll and use them as a wallpaper on your iPad or iPhone • Future updates will add to this collection the latest images from Cassini as more become available. "I like to know that even if I'm out of Wi-Fi range, I can always take a trip through Saturn's rings." — Carl Zimmer "worth a download" — TUAW "I give it a rating of 10 rings out of 10." — It's Okay To Be Smart "An excellent app that brings the beauty and magic of this planet right to your fingertips." — Earthscanner

About

AstroPic

Features
Read full description

Your gateway to the daily wonders of space. Curated from NASA's Astronomy Picture of the Day (APOD) archive, this app brings you breathtaking images and fascinating insights into the universe. Daily APOD: Start your day with a stunning new image from NASA's APOD archive. Each picture is accompanied by a detailed description, offering insights into the science and story behind the image. Random APOD: Feeling adventurous? Let the app surprise you with a random selection from the extensive APOD collection. Who knows what marvels you'll discover next? Search APOD: Looking for something specific? Use our powerful search feature to find APOD images by date, keyword, or theme. Whether it's a favorite nebula or a significant astronomical event, finding it is just a tap away.

Screenshots

Cassini HD4 screens
AstroPic4 screens

Verdict

The call

The clearest difference is price: AstroPic at Free against Cassini HD's $1.99. AstroPic also leads on iOS requirement (15.0 vs 17.0). Cassini HD's advantage is update cadence (every 2 months vs every 5 months). On ads, in-app purchases 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

AstroPic is free to download; Cassini HD costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Cassini HD ships an update every 2 months, AstroPic every 5 months. The most recent releases landed on October 21, 2026 and October 25, 2026 respectively.

Scorecard3 real differences · 7 level
Cassini HD versus AstroPic: the parameters behind the verdict, then further details
ParameterCassini HDAstroPic
Price$1.99Free — better
Rating4.3 (6 ratings) — better—
Positive reviews94.1% of reviews—
Number of ratings6 — better—
Update frequencyEvery 2 months — betterEvery 5 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.015.0 — better
Further details — not scored
Size124 MB6 MB
Age rating4+4+
DeveloperThinx Media Interactive LLCRon Tabachnik

In-app purchases

None

Cassini HD

No in-app purchases

None

AstroPic

No in-app purchases

Questions

Is Cassini HD free?
Cassini HD costs $1.99, with no in-app purchases.
Is AstroPic free?
AstroPic is free to download, with no in-app purchases.
Do Cassini HD or AstroPic have ads?
Neither Cassini HD nor AstroPic shows ads.
Which is updated more often, Cassini HD or AstroPic?
Cassini HD ships an update every 2 months, and AstroPic every 5 months. Most recently, Cassini HD was updated on October 21, 2026 and AstroPic on October 25, 2026.

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