AstroStacker vs Image Frame Extract Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
AstroStacker
Enhance your night sky photos by stacking multiple exposures into a single, detailed image. This app automatically aligns stars, reduces noise, and offers tools to refine your astrophotography results directly on your iPhone or iPad.
- Stack multiple night sky photos
- Automatic star alignment
- Noise reduction for clearer images
- Advanced editing tools
- Support for calibration frames (Pro)
- On-device processing
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Stack your night-sky photos into one cleaner, more detailed image, right on your iPhone or iPad. Astrophotography stacking combines many exposures of the same sky. Astro Stacker finds the stars in every frame, lines them up and combines them, so random noise falls away and faint stars, the Milky Way and deep-sky targets come through. HOW IT WORKS 1. Take several separate photos of the same patch of sky from a tripod or stable surface. 2. Import them from Photos or Files into a Deep Sky Studio project. 3. Pick a stack mode and tap Stack. 4. Finish the result with Auto Stretch, styles and colour tools, then save or export. THREE SIMPLE STACK MODES - Quick: averages every frame for a fast first look. - Quality (default): rejects outliers such as plane and satellite trails, and leaves out the weakest frames. - Max Detail: the slowest and most selective mode, with finer alignment. AUTOMATIC STAR ALIGNMENT Stars are detected and matched in every frame, with sub-pixel alignment and a quality check for each frame. Stacking needs clear stars in your photos to line them up. CALIBRATION FRAMES (PRO) Add darks, flats, dark-flats and bias frames to correct hot pixels, thermal noise, vignetting and dust. Astro Stacker sorts frames by file name and exposure, so files named "dark" or "flat" are picked up for you. FINISH IN THE SAME APP - Auto Stretch to bring faint signal into view - Gradient removal for light pollution and uneven skies - Local contrast, vibrance, levels and per-channel colour balance - Styles: Natural, Nebula Pop, Cosmic Drama and Scientific, each with a strength slider - Before-and-after comparison - Quick Enhance for a single photo you've already taken FILES IN AND OUT - Import: photos from your library on Free; camera RAW, Apple ProRAW and FITS on Pro - Export: JPG, PNG, TIFF and FITS, with 16-bit export on Pro ON-DEVICE Stacking and editing run on your iPhone or iPad. You don't need a computer, and your source frames are not uploaded to stack them. An optional account backs up finished results. FREE AND PRO Free: 1 free stack with up to 10 light frames, and 3 saved results. Pro: unlimited frames and stacks, RAW, ProRAW and FITS import, calibration frames, 16-bit export and unlimited history. Choose monthly, annual or a one-time lifetime purchase. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the period, and you can manage them in your App Store account settings. GOOD TO KNOW - Moon, planet and solar stacking (Planet Lab) is coming soon. Today's stacking needs stars to align on. - Colour FITS files from one-shot-colour cameras are not debayered yet. - Star-trail stacking isn't supported, because every stack is aligned on the stars. Guides to capturing and stacking: https://astrostacker.co/guides Privacy Policy: https://astrostacker.co/privacy Terms of Use: https://astrostacker.co/terms Apple Standard EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Image Frame Extract Pro
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Extract full-resolution still images from any video or GIF. Pick exact frames. No auto-extraction. You control every output. • Import a video or GIF • Move slider to exact moment • Add stills you want • Review and deselect • Export up to 50 images to Files or Photos • Use exported set with iOS Wallpaper Photo Shuffle • Uses AVFoundation and ImageIO for source-resolution frame render • Zero time tolerance for frame accuracy • Full EXIF safe output • One tap share: compatible with iOS Lock Screen shuffle • No timeline trimming. No template. Manual precision only • Both GIF and video in one tool • Focused UI. Minimal steps. Fast output • Exact decoding frame. Not approximated JPEG preview • No watermark. No upscaling. Original fidelity Precise still capture from any motion source. • Import MOV MP4 GIF • Exact frame seeking • Batch up to 50 selected stills • High-resolution export • iOS Lock Screen shuffle support • Full share actions (Photos or Files) • Works offline
Screenshots
Verdict
The clearest difference is price: AstroStacker at Free against Image Frame Extract Pro's $0.99. Image Frame Extract Pro's advantage is in-app purchases (none vs 3). On ads, device support and iOS requirement 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
AstroStacker is free to download; Image Frame Extract Pro costs $0.99 up front. AstroStacker sells 3 in-app purchases, starting at $12.99 per month. Image Frame Extract Pro asks for nothing beyond the download.
| Parameter | AstroStacker | Image Frame Extract Pro |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | 1.1 (7 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 7 — better | — |
| Update frequency | Every 2 weeks | — |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Freemium | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 16 — better |
| Further details — not scored | ||
| Size | 17 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Ahmed Al-Mahmud | EyeOS Store Inc. |
In-app purchases
AstroStacker
- AstroStacker app3 Days trial$12.991 Month
- AstroStacker app3 Days trial$99.991 Year
- AstroStacker app$219.00
Image Frame Extract Pro
No in-app purchases
Questions
Is AstroStacker free?
Is Image Frame Extract Pro free?
Do AstroStacker or Image Frame Extract Pro have ads?
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