Comparison

Astro Stacker vs Eagle Image Stacker

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

Head to head
About

Astro Stacker

Transform your smartphone into a powerful astrophotography tool. This app uses advanced algorithms to combine multiple night sky photos, reducing noise and revealing hidden celestial details for professional-quality results.

Highlights
  • Advanced stacking algorithms (Average, Median, Maximum, Minimum)
  • Intelligent and manual image alignment
  • Real-time processing and progress tracking
  • On-device processing, no cloud upload
  • Export high-resolution stacked images
  • Detailed processing insights and logs
Features
Read full description

ASTRO STACKER - Professional Image Stacking for Astrophotography Turn your smartphone into a powerful astrophotography tool! Astro Stacker uses advanced image stacking algorithms to combine multiple photos of the night sky, dramatically reducing noise and revealing celestial details invisible to the naked eye. PERFECT FOR: - Amateur astronomers capturing the Milky Way - Astrophotography enthusiasts shooting deep space objects - Stargazers photographing planets and constellations - Night sky photographers wanting professional results KEY FEATURES: ADVANCED STACKING ALGORITHMS - Average Stacking - Reduce noise by averaging pixel values - Median Stacking - Remove satellites and airplane trails automatically - Maximum Stacking - Capture the brightest stars and details - Minimum Stacking - Eliminate hot pixels and artifacts INTELLIGENT ALIGNMENT - Feature Detection - Automatically align stars across images - Center of Mass - Perfect for tracking celestial objects - Manual alignment options for precise control - Handles slight camera movement between shots REAL-TIME PROCESSING - Live progress tracking with detailed logs - See exactly what's happening during processing - Parallel processing for maximum speed - Works entirely on-device - no cloud upload needed PROFESSIONAL RESULTS - Export high-resolution stacked images - Preserve original image quality - Compare before/after results - Share directly to social media or save to Photos PROCESSING INSIGHTS - View detailed processing logs - Track alignment accuracy - Monitor stacking progress in real-time - Understand how each image contributes HOW IT WORKS: 1. Take 5-15 photos of the same night sky scene (use a tripod for best results) 2. Import images from your photo library 3. Select your stacking method and alignment technique 4. Watch as Astro Stacker combines your images 5. Export your noise-free, detail-rich astrophoto TIPS FOR BEST RESULTS: - Use a tripod or stable surface - Take 8-15 images of the same scene - Keep exposure settings consistent - Focus on stars or your main subject - Shoot in RAW format if possible NO SUBSCRIPTION REQUIRED Pay once, stack unlimited images forever. All processing happens on your device - your photos never leave your phone. PRIVACY FIRST - No account required - No data collection - No cloud processing - Complete offline functionality Whether you're capturing the Andromeda Galaxy, the Orion Nebula, or simply want cleaner Milky Way shots, Astro Stacker gives you professional astrophotography results right on your iPhone. Download now and reveal the hidden universe in your night sky photos! Privacy Policy: https://www.spacesss.com/apps/privacy Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Terms & Conditions: https://www.spacesss.com/apps/terms-and-conditions

About

Eagle Image Stacker

Astro stacking and RAW image processing toolkit for iPhone. Align, stack, and export high-quality results for star fields, galaxies, planets, and more. Features on-device processing for privacy and flexibility.

Highlights
  • RAW, DNG, ProRAW, JPEG, HEIF, TIFF support
  • Astro Mode for deep-sky objects
  • Planets Mode with ROI tracking
  • RAW converter and inspector
  • Calibration tools (dark, flat frames)
  • On-device processing
  • Export high-quality results
Read full description

Eagle Image Stacker is a local-first astronomy imaging toolkit for iPhone. Import or capture RAW, DNG, ProRAW, JPEG, HEIF, TIFF, and other supported image files, then align, calibrate, stack, inspect, and export high-quality results. Use Astro Mode for star fields, galaxies, nebulae, and deep-sky sequences. Use Planets Mode for Moon and planet workflows with ROI tracking and alignment tools. RAW Converter helps inspect and export camera files, while calibration tools support dark frames, flat fields, hot-pixel review, masks, and alignment analysis. The app is built for on-device processing. Your selected images and generated outputs remain local unless you choose to save, export, or share them through iOS. Some capture features depend on your iPhone hardware. RAW and Apple ProRAW availability varies by device. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Subscription Terms: https://sites.google.com/view/eis-subscription-terms/ Privacy Policy: https://sites.google.com/view/eagle-image-stacker-privacy2/

Screenshots

Astro Stacker4 screens
Eagle Image Stacker4 screens

Verdict

The call

The clearest difference is monetization model: Astro Stacker at free against Eagle Image Stacker's free with in-app purchases. Astro Stacker also leads on ratings volume (4 vs 1). On price, rating, review sentiment 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Astro Stacker sells 3 in-app purchases, starting at $12.99 per month and Eagle Image Stacker sells 3 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 1.0 for Astro Stacker against 1.0 for Eagle Image Stacker. Both are backed by a comparable volume of ratings — 4 and 1 respectively. Written reviews split almost evenly too, at 0% and 0% positive.

Scorecard2 real differences · 8 level
Astro Stacker versus Eagle Image Stacker: the parameters behind the verdict, then further details
ParameterAstro StackerEagle Image Stacker
PriceFreeFree
Rating1.0 (4 ratings)1.0 (1 ratings)
Positive reviews0.0% of reviews0.0% of reviews
Number of ratings4 — better1
Update frequencyFortnightly—
AdsNoNo
In-app purchasesYesYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad — betteriPhone
Requires iOS17.0 — better18.0
Further details — not scored
Size16 MB31 MB
Age rating4+4+
DeveloperAhmed Al-MahmudAL MUATASIM AL MAADI

Customer experience

Astro Stacker

All ratings3 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews9 reviews
Positive0.0%
Neutral22.2%
Negative77.8%

Eagle Image Stacker

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

3 purchases

Astro Stacker

Subscriptions2
  • AstroStacker app$12.991 Month
  • AstroStacker app$99.991 Year
One-time1
  • AstroStacker app$219.00
3 purchases

Eagle Image Stacker

Subscriptions2
  • Eagle Pro Monthly$9.991 Month
  • Eagle Pro Annual7 Days trial$40.991 Year
One-time1
  • Eagle Pro Lifetime$49.99

Questions

Is Astro Stacker free?
Astro Stacker is free to download, with in-app purchases available.
Is Eagle Image Stacker free?
Eagle Image Stacker is free to download, with in-app purchases available.
Which has better reviews, Astro Stacker or Eagle Image Stacker?
Astro Stacker and Eagle Image Stacker are both rated 1.0 out of 5 on the App Store, from 4 and 1 ratings respectively.
Do Astro Stacker or Eagle Image Stacker have ads?
Neither Astro Stacker nor Eagle Image Stacker shows ads.

Other comparisons